Mobile hand-held sawing machine having pre-cutting assembly and grip

ABSTRACT

A mobile hand-held sawing machine having: a sawing assembly (11), which has a sawing tool holder (14) for a sawing tool (15) and a saw drive motor (12) for driving the sawing tool holder (14); and a guide device (17), which has a guide body (18) having a guide face (19), extending along a longitudinal axis (L), for guiding the hand-held sawing machine (10) in a working direction (AR) on a workpiece (W); the hand-held sawing machine (10) having a pre-cutting assembly (31), which is arranged on the guide device (17) in front of the sawing assembly (11) in relation to the working direction (AR) in a longitudinal position in relation to the longitudinal axis (L) and has a pre-cutter tool holder (34) for a pre-cutting tool (35) and a pre-cutter drive (32A) for driving the pre-cutter tool holder (34)

The invention relates to a mobile handheld machine saw having a sawassembly, which has a saw toolholder for a saw tool, in particular a sawblade, and a saw drive motor for driving the saw toolholder, and havinga guide device, which has a guide surface extending along a longitudinalaxis for guiding the handheld machine saw along a working direction on aworkpiece or a guide rail, wherein a saw cut can be introduced into theworkpiece along the working direction by means of the saw toolprotruding in front of the guide surface in saw operation of thehandheld machine tool, wherein the handheld machine saw has a scoringassembly arranged in front of the saw assembly in a longitudinalposition with respect to the longitudinal axis on the guide device withrespect to the working direction, having a scorer toolholder for ascoring tool, in particular a scorer saw blade, and having a scorerdrive for driving the scorer toolholder, which is movably mounted on orwith respect to the guide device by means of a scorer depth settingbearing along a depth setting movement path between at least one activeposition, in which the scoring tool arranged on the scorer toolholderprotrudes in front of the guide surface to introduce a score upstream ofsaw cut to be introduced in the working direction into the workpiece,and an inactive position, in which the scoring tool is adjusted behindthe guide surface.

Typically, a handheld machine saw of this type is held on the handle ofthe saw assembly, for example, on a handle extending in parallel to thelongitudinal axis of the guide body, which can be grasped by theoperator. For example, such a handheld machine saw of this type isdescribed in WO 93/03894 A1. However, the handling of such a handheldmachine saw is uncomfortable. In particular, it has been shown thatadditional forces act on the handheld machine saw during scoreroperation.

Handheld machine saws having scoring assemblies are known, for example,from DE 73 24 551 U1, DE 38 00 935 A1, DE 91 06 212 U1, and U.S. Pat.No. 5,724,740.

It is therefore the object of the present invention to improve thehandling of a handheld machine saw of the type mentioned at the outset.

To achieve this object, it is provided in a handheld machine saw of thetype mentioned at the outset that it has a scorer handle body, assignedto the scoring assembly, having a handle surface for an operator forguiding the handheld machine tool, which is arranged on an upper side ofthe guide device opposite to the guide surface in the longitudinalposition of the scorer toolholder or the scoring assembly.

The operator can thus exert a force in the direction of the guidesurface precisely in the region of the scoring tool, so that forcesoriginating from the scoring tool and oriented opposite thereto can becompensated by the operator.

The scoring tool can be adjusted into the inactive position, forexample, when a score is not to be produced.

The handheld machine saw it can have one or more scorer handle bodiesassigned to the scoring assembly. Multiple, for example at least two orexactly two scorer handle bodies can thus be provided, which have one ormore of the properties explained hereinafter. Thus, when a scorer handlebody having a certain property is explained hereinafter, another scorerhandle body of the handheld machine saw can also have this property, butalso another property or quality additionally or alternatively to thisproperty.

It is advantageous if the scorer handle body does not form a componentof a bearing body and/or a setting device of an adjustment device of thehandheld machine saw. For example, the scorer handle body is separatefrom a miter bearing or does not form a component of a miter bearing.Furthermore, it is advantageous if the scorer handle body does not forma component of a depth setting bearing, for example, of the scorer depthsetting bearing. A ratio of the penetration depths of the scoring tooland the saw tool into the workpiece can be settable, for example, usinga setting device of the adjustment device. For example, the scorerhandle body is not formed by an actuating handle or a knob of apositioning screw, a handle of a positioning lever, or the like.

It is furthermore advantageous if the scorer handle body does not form acomponent of scorer depth setting means, which is used to set a distanceof the scorer toolholder to the guide device or the guide surface and/orto set the penetration depth of the scoring tool into the workpiece inthe at least one active position.

It is advantageous in particular if the scorer handle body, except for aprotective function or cover function for a component of the handheldmachine saw, is exclusively used as a handle to be grasped by anoperator. The scorer handle body can therefore form a component of ascoring assembly housing of the scoring assembly or another housing orprotective housing, but otherwise only has the function of a handlebody.

It is advantageously provided that the scorer handle body and/or thescoring assembly forms the frontmost component of the handheld machinesaw in the working direction, which is arranged on the guide body. Nofurther component is arranged on the guide body or the guide device infront of the scoring assembly in the working direction, in particular nobearing, handle, or the like.

It is also possible that the scorer handle body forms the frontmostcomponent in the working direction of the handheld machine saw that canbe grasped by an operator, which is arranged on the guide body. Stillfurther components can be arranged on the guide body or the guide devicein front of the scorer handle body in the working direction, but theyare not provided and/or designed to be grasped by the operator.

It is furthermore possible that the scorer handle body forms thefrontmost component in the working direction of the handheld machine sawwhich protrudes from the upper side of the guide device and can begrasped by an operator. A handle groove or the like can also be arrangedin front of the scorer handle body in the working direction, forexample, on the upper side of the guide device.

It is furthermore advantageously provided that the saw toolholder, inparticular the saw assembly as a whole, is movably mounted on or withrespect to the guide device by means of a saw depth setting bearingbetween an upper depth setting position and at least one lower depthsetting position, wherein the saw tool protrudes further in front of theguide surface in the lower depth setting position than in the upperdepth setting position. Therefore, for example, saw cuts of differentdepths can be introduced into the workpiece.

The saw depth setting bearing and the scorer depth setting bearing arepreferably arranged in a longitudinal distance with respect to theworking direction on the guide body.

The saw depth setting bearing and the scorer depth setting bearing arepreferably arranged separately from one another on the guide body.

The saw depth setting bearing and the scorer depth setting bearingpreferably have no shared bearing components.

In a handheld machine saw according to the preamble of claim 1 which hasa scorer depth setting bearing and a saw depth setting bearing foradjusting the saw toolholder between the upper depth setting positionand the at least one lower depth setting position, the following measureforms an invention which is independent as such. Independently thereof,the following measure is also an advantageous embodiment in the handheldmachine saw described up to this point:

It is advantageously provided that the handheld machine saw has at leastone saw assembly handle, using which the saw toolholder, in particularthe saw assembly as a whole, is actuatable between the upper depthsetting position and the at least one lower depth setting position,wherein the scorer handle body assigned to the scoring assembly, whichis arranged on the upper side of the guide device opposite to the guidesurface and which advantageously has the a handle surface for anoperator for guiding the handheld machine tool, comprises the at leastone saw assembly handle or is formed by the at least one saw assemblyhandle, wherein the scorer toolholder is actuatable by means of the sawassembly handle between the inactive position and the at least oneactive position and the saw assembly handle is actuatable with respectto the guide body beyond a position assigned to the active position ofthe scorer toolholder to adjust the saw toolholder into the at least onelower depth setting position. The saw assembly handle is advantageouslyarranged on the saw assembly, in particular on a saw assembly housing ofthe saw assembly. For example, the saw assembly handle is fixedlyconnected to the saw assembly housing.

For example, the saw assembly handle has a first position assigned tothe upper depth setting position of the saw toolholder and the inactiveposition of the scorer toolholder, from which the saw assembly handle isfirst adjustable into a second position, in which the scorer toolholderis adjusted into the active position, wherein the saw assembly handlecan be adjusted starting from the second position without furtheradjustment of the scorer toolholder into at least one third position, inwhich the saw toolholder assumes a lower depth setting position.

Such a saw assembly handle does have a handle surface for an operatorfor guiding the handheld machine tool and is arranged on an upper sideof the guide device opposite to the guide surface. This saw assemblyhandle, which forms the or a scorer handle, can advantageously bearranged on the guide device in the longitudinal position of the scorertoolholder or the scoring assembly. However, it is also possible thatthis saw assembly handle is arranged, for example, on the guide devicein the longitudinal position of the saw assembly or between the saw tooltoolholder and the scorer toolholder.

A step-down transmission can be provided, for example, between the sawassembly handle forming a scorer handle body and the scorer toolholder,in particular a curve transmission, link transmission, or the like.Furthermore, a clearance is advantageously provided between the sawassembly handle and the scorer toolholder in such a way that the sawassembly handle holds the scorer toolholder in the active position andthe clearance permits a further adjustment of the saw assembly handle toadjust the saw toolholder into a lower depth setting position.

The following is advantageously provided:

It is advantageously provided that the handheld machine saw has adriving device to provide a driving coupling between the saw toolholderand the scorer toolholder, by which, upon a movement of the sawtoolholder between depth setting positions and/or between the upper andthe at least one lower depth setting position, the scorer toolholder iscarried along between the inactive position and the at least one activeposition, wherein the driving device has an actuation generator arrangedon the saw assembly for actuating an actuation acceptor arranged on thescoring assembly. The actuation generator actuates the actuationacceptor, wherein the scoring assembly as a whole or the scorertoolholder is actuatable, for example, from the inactive position intothe at least one active position and/or from the at least one activeposition into the inactive position.

The actuation generator of the saw assembly and the actuation acceptorof the scoring assembly are advantageously mechanically coupled to oneanother or engaged with one another. The actuation generator can bearranged fixedly or movably on the saw assembly and the actuationacceptor can be arranged fixedly or movably on the scoring assembly. Thecarrying along of the scorer toolholder by the saw toolholder can takeplace, for example, between two different lower depth setting positions.The carrying along preferably takes place between the upper depthsetting position and one or more lower depth setting positions. Theactuation generator and the actuation acceptor can also be components ofa transmission, a gearwheel transmission, a cable pull transmission, aBowden cable, or the like.

The driving device can only couple the toolholders to one another. Forexample, it is possible that due to the driving device, the sawtoolholder carries along the scorer toolholder. However, it is preferredif the driving device enables a movement coupling between the sawassembly and the scoring assembly as a whole, so that the scoringassembly is carried along by the saw assembly upon an adjustment of thesaw assembly.

The handheld machine saw preferably has one or more movable components,for example, for setting the position of the scoring tool, the saw tool,or the like. The scorer handle body can certainly be arranged movablywith respect to the guide device. However, it is advantageous if thescorer handle body is arranged fixed in place on the guide device withrespect to the depth setting movement path of the scorer toolholder, sothat its handle surface is fixed in place with respect to the depthsetting movement path and can be loaded with an actuating force in theforce direction of the movement path. The scorer handle body thusremains fixed in place during a depth adjustment, for example, to adjustthe scorer toolholder or the scoring tool between the active positionand the inactive position.

It is advantageous if the scorer handle body is arranged pivot-fixed onthe guide device with respect to the pivot axes extending transverselyto the longitudinal direction of the guide device, in particular eachpivot axis extending transversely to the longitudinal axis. For example,the saw toolholder and/or the scorer toolholder can pivot around such apivot axis. The operator thus has a handle surface fixed in place withrespect to these pivot axes available in order to actuate the scoringassembly or scoring tool in the sense of guiding or an application offorce toward the guide surface.

It is possible in principle that the scorer drive is arranged at anyarbitrary point. However, it is advantageous if the scorer drive isarranged between the upper side of the guide device and the handlesurface of the scorer handle body. The scorer drive comprises, forexample, a drive motor. The scorer drive can be movable between thehandle surface and the upper side of the guide device, for example, toalso take part in a movement of the scorer toolholder along the movementpath.

It is preferred if the scorer handle body or at least one of the scorerhandle bodies is arranged on a scoring assembly housing of the scoringassembly or is formed by the scoring assembly housing, wherein thescoring assembly housing has a receptacle space, in which at least onemovable component of the scoring assembly, in particular the scorertoolholder, is accommodated movably relative to the scorer handle body.The at least one movable component advantageously comprises the scorerdrive and/or scorer depth setting means for setting a distance of thescorer toolholder to the guide device or the guide surface and/or thepenetration depth of the scoring tool into the workpiece in the at leastone active position. Further components of the scoring assembly, forexample, a deactivation device, etc., can readily also be arranged atleast partially in the scoring assembly housing.

The scoring assembly preferably has at least one further housing, forexample, a drive housing, which is accommodated in the scoring assemblyhousing, in particular movably. For example, the scorer drive motor fordriving the scorer toolholder can be accommodated in a drive housing,which is in turn accommodated entirely or partially in the scoringassembly housing.

The scoring assembly housing preferably has ventilation ribs for thescorer drive.

The scoring assembly housing preferably has elastic and/or yieldingwalls.

The scoring assembly housing is preferably designed like a protectivehood or protective cover.

The scoring assembly housing preferably has a cover wall on its sidefacing away from the guide device and/or upper side.

At least one front side wall in the working direction and/or one rearside wall in the working direction is advantageously provided in thescoring assembly housing. The at least one side wall is preferablyconnected to or integral with the cover wall.

Furthermore, the scoring assembly housing preferably has a long sidewall on its side facing away from the scorer toolholder and/or oppositeto the scorer toolholder. The long side wall is preferably connected toor integral with the cover wall and/or the at least one front or rearside wall in the working direction.

It is advantageous if the handle surface is formed by a wall, inparticular a cover wall, of the scoring assembly housing or is arrangedon the wall. The wall of the scoring assembly housing has elasticproperties, for example, i.e., it damps vibrations, for example, whichoriginate from the workpiece processing or from drive motors of thehandheld machine saw.

It is furthermore advantageous if the handle surface of the scorerhandle body is arranged on a part of the scoring assembly housing facingaway from the upper side of the guide body. The handle surface can alsoextend, for example, to an upper side of the guide body inclined inrelation to the rear side opposite to the working direction or inrelation to the working direction or can be arranged thereon.

It is advantageous if an intermediate space or distance is providedbetween the saw assembly housing and the scorer handle body, preferablythe scoring assembly housing, in relation to the longitudinal axis ofthe guide device or the guide body, in which at least one actuatingelement of the scoring assembly provided for actuation by an operator isarranged. The actuating element comprises, for example, an actuatingelement of a deactivation device of the scoring assembly and/or anactuating element of a transverse adjustment device and/or an actuatingelement of scorer depth setting means.

Additionally or alternatively to the design and/or arrangement of thehandle surface of the scorer handle body on the scoring assemblyhousing, however, it is also possible that the scorer handle bodycomprises a handle body separate from the scoring assembly or from ascoring assembly housing of the scoring assembly or is formed by such ahandle body, wherein an intermediate space is provided between thisscorer handle body and the scoring assembly, so that an operator canreach into the intermediate space to grasp the scorer handle body. It istherefore possible both that the scoring assembly housing is present andprovides a handle surface, but moreover also an additional scorer handlebody.

It is preferably provided that the scorer handle body is pivotablymounted around at least one pivot axis, in particular around a miteraxis parallel to the working direction or the longitudinal axis of theguide device, on the guide device by means of a pivot bearingarrangement, in particular a miter bearing arrangement. The scorerhandle body can thus pivot around the pivot axis, in particular themiter axis, for example, to introduce miter cuts into a workpiece.

It is advantageous if the scorer handle body is arranged fixed in placeon a carrier for the scoring assembly and/or the scorer toolholder,wherein the carrier is pivotable relative to the guide device to changethe relative position of the scorer toolholder in relation to the guidesurface, in particular by means of a miter bearing arrangement, aroundat least one pivot axis, in particular around a miter axis parallel tothe working direction or to the longitudinal axis of the guide device.The carrier can support, for example, the scoring assembly housing. Thecarrier is or comprises, for example, a protective housing foraccommodating the saw tool and/or the scoring tool. A part of the sawtool or scoring tool facing away from the guide surface is accommodatedin the protective housing. The protective housing is, for example, aprotective hood or extraction hood for extracting dust.

It is advantageous if the saw toolholder, in particular the saw assemblyas a whole is arranged on the carrier. The saw assembly is thus alsopivotable mounted around the miter axis with respect to the guidedevice. At least one saw assembly handle can also be arranged on thecarrier, which will be described later. Multiple or all saw assemblyhandles are preferably arranged on the carrier.

The guide body can also advantageously be used to guide the handheldmachine saw. It is preferably provided that the guide body has a handlepart on its upper side, which is at least essentially concealed by thescoring assembly in a pivot position of the carrier pivoted toward theupper side and is exposed for actuation by an operator of the handheldmachine saw in a pivot position of the carrier pivoted away from theupper side. Thus, for example, if the carrier assumes a miter positionprovided for a vertical cut into the workpiece, for example, a so-called0° cut, the handle part of the guide body is entirely or partiallyconcealed by the scoring assembly. However, if the carrier is pivotedinto a miter position in which the scoring assembly and/or the sawassembly assumes an angle position in relation to the upper side of theguide body, the handle part is exposed to be grasped or actuated by theoperator.

The scorer handle body can be designed, for example, like a bow oranother body, the longitudinal ends of which are each secured fixed inplace. However, it is preferred if the scorer handle body protrudes witha free end region freely in front of the carrier. For example, theoperator can grasp the free end region of the scorer handle body at aside of the handheld machine saw opposite to the scoring tool or sawtool or from this side.

It is preferred if the handle surface extends up to the free end regionor is arranged at the free end region and/or a support part is arrangedat the free end region at a distance to the carrier, which is supportedin at least one pivot position of the carrier with respect to the atleast one pivot axis on the upper side of the guide device. For example,the carrier is pivoted in a miter position provided for a vertical cutinto the workpiece in such a way that the support part is supporteddirectly on the guide body. Impacts, which can occur if the handheldmachine saw falls down onto an underlying surface, can thus be absorbed,for example. The protective part also protects from damages even if, forexample, the scoring assembly housing has elastic walls or yieldingwalls.

An embodiment of the scorer handle body is advantageous, for example,such that it has a longitudinal shape and extends along a handlelongitudinal axis which extends transversely, in particularperpendicularly transversely, to the longitudinal axis of the guidedevice.

Furthermore, it is advantageous if the scorer handle body extendsessentially over the entire transverse width of the guide bodytransversely to its longitudinal axis. One advantageous conceptprovides, for example, that the guide body has long sides extending inparallel to its longitudinal axis, between which the scoring assembly isarranged, wherein the scorer toolholder is arranged on the one long sideand the scorer handle body extends away from this long side up to theother long side, in particular up to directly at the other long side. Itis obvious that the scorer handle body does not have to extend up to thelong side on which the toolholders are arranged.

Multiple possibilities are provided in the design of the handle surfaceof the scorer handle body or also the above-explained handle part on theguide body. It is advantageously provided, for example, that the handlesurface of the scorer handle body and/or a handle part of the guide bodyarranged on the upper side of the guide body, in particular below thescoring assembly or directly adjacent to the scoring assembly, comprisesa handle groove and/or a planar surface and/or a handle knob that can begrasped with a hand.

Furthermore, it is readily possible that the handheld machine saw hasstill further handles, handle parts, or the like. One advantageousembodiment thus provides that at least one saw assembly handle isarranged on the saw assembly behind the scorer handle body with respectto the working direction, in particular two saw assembly handles arearranged.

Using the at least one saw assembly handle, for example, the sawassembly or the saw toolholder can be adjusted with respect to thepenetration depth of the saw tool into the workpiece. However, it isalso advantageously possible to guide the handheld machine saw in theworking direction by way of such a saw assembly handle.

Both above-mentioned actions are also facilitated or enabled by the sawassembly handle described hereinafter: The handheld machine sawadvantageously has a saw assembly handle arranged behind the sawtoolholder on the saw assembly with respect to the working direction.This saw assembly handle expediently has a longitudinal shape having alongitudinal axis which extends in parallel to the longitudinal axis ofthe guide body. Therefore, for example, two saw assembly handles can beprovided, one of which is oriented in parallel to the longitudinal axisof the guide body and one of which is oriented transversely thereto. Inaddition, the scorer handle body is still provided.

It is advantageously furthermore provided in the handheld machine sawthat it has a saw assembly handle arranged in front of the sawtoolholder on the saw assembly with respect to the longitudinal axis ofthe guide body parallel to the working direction in at least one depthsetting position of the saw toolholder. The saw assembly handlepreferably has a longitudinal shape having a longitudinal axis whichextends transversely, in particular perpendicularly transversely, to thelongitudinal axis of the guide body.

The saw assembly handle and the at least one scorer handle body arepreferably mounted pivotably on the guide device by means of a miterbearing arrangement around a miter axis parallel to the workingdirection or to the longitudinal axis of the guide device. The scorerhandle body can in principle be pivotable relative to the saw assemblyhandle with respect to the miter axis. However, it is preferred if thescorer handle body and the saw assembly handle are pivot-fixed withrespect to the miter axis. It is possible here that the saw assemblyhandle and the scorer handle body are movable relative to one anotherwith respect to at least one further degree of movement freedom, forexample, around pivot axes of the saw depth setting bearing and/or thescorer depth setting bearing.

The scoring tool and/or the saw tool are preferably designed as a sawblade, in particular a circular saw blade. However, it would also bepossible in principle that the saw tool is, for example, a jigsaw bladeor similar other saw blade of a noncircular type. Furthermore, thescoring tool can also, for example, comprise a milling head or a millingtool or can be formed thereby.

An embodiment of saw tool and scoring tool as a saw blade is preferred.One advantageous embodiment provides that the ratio of an externaldiameter of the saw tool to an external diameter of the saw drive motoris greater, in particular at least 1.5 times greater, preferably twotimes greater, more preferably at least 2.5 times greater than a ratioof the external diameter of the scoring tool to an external diameter ofthe scorer drive motor.

The handheld machine saw is a machine saw to be guided manually alongthe workpiece. The machine can be guided freely over the workpiece,i.e., operated without a guide rail. However, operation with a guiderail is preferred. The handheld machine saw is preferably a plunge sawand/or does not have a protective cover for a section of the saw tooland/or the scoring tool protruding freely in front of the guide surface.

The saw assembly and the scoring assembly are arranged on an upper sideof the guide device opposite to the guide surface. The guide devicecomprises, for example, a so-called saw table. The guide device or theguide body preferably comprises a plate body, on one side of which theguide surface is arranged and on the side of which opposite to the guidesurface or the upper side of which the saw assembly and the scoringassembly are arranged. Guide receptacles, for example longitudinalgrooves or the like, for guide ribs or guide projections of a guide railare preferably arranged on the guide surface.

The saw drive motor and/or the scorer drive motor are preferablyelectrical motors, in particular universal motors or brushless,electronically commutated motors or DC motors. Different motor types canbe used as the saw drive motor and scorer drive motor, for example, anelectronically commutated motor as the saw drive motor and a DC motor asthe scorer drive motor.

An exemplary embodiment of the invention is explained hereinafter on thebasis of the drawings. In the figures:

FIG. 1 shows a perspective diagonal view diagonally from the front of ahandheld machine saw having a saw assembly and a scoring assembly in anupper depth setting position,

FIG. 2 shows the handheld machine saw according to FIG. 1 , but in alower depth setting position,

FIG. 3 shows the handheld machine saw according to FIGS. 1 and 2 on aguide rail in a miter location and viewed diagonally from the rear,

FIG. 4 shows a detail view from FIG. 3 from frontally forward of a lowerpart of the handheld machine saw and of the guide rail, wherein a guidebody of the handheld machine saw and the guide rail engage in oneanother with additional engaging-behind contours,

FIG. 5 shows a variant of the handheld machine saw according to theabove figures having a scoring assembly pivotable separately from thesaw assembly around a miter axis or a scoring assembly fixed in placewith respect to the miter axis,

FIG. 6 shows a side view of the handheld machine saw according to FIG. 1, approximately in a viewing direction BR1 having open protectivehousing and its saw assembly in an upper depth setting position,

FIG. 7 shows a right part of the view according to FIG. 6 , wherein thesaw assembly is adjusted into a lowermost depth setting position, butthe scoring assembly is inactive,

FIG. 8 shows the view according to FIGS. 6 and 7 , but having sawassembly adjusted into a lowermost depth setting position and scoringassembly adjusted into an active position,

FIG. 9 shows the view according to FIG. 8 , but having saw assemblyadjusted into an only-scorer depth setting position and scoring assemblyadjusted into the active position,

FIG. 10 shows an only-scoring depth stop device in a release position,which enables an adjustment of the saw assembly according to FIG. 8 , asa detail D2 of the handheld machine saw additionally shown diagonallyfrom the rear as a whole in FIG. 10 ,

FIG. 11 shows the only-scoring depth stop device according to FIG. 10 ,but in its stop position, which corresponds to an only-scorer depthsetting position of the saw assembly,

FIG. 12 shows a detail view of the scoring assembly diagonally from thefront, approximately from the viewing direction of FIG. 1 ,

FIG. 13 shows the scoring assembly according to FIG. 12 , but diagonallyfrom the rear, approximately corresponding to the viewing direction inFIG. 3 , in an activation position,

FIG. 14 shows the view of the scoring assembly according to FIG. 13 ,wherein the scoring assembly is adjusted into a deactivation position,

FIG. 15 shows a section through the scoring assembly according to FIG.13 , approximately along a line of section A-A through its deactivationdevice,

FIG. 16 shows a view diagonally from the front of the scoring assemblyof the handheld machine saw according to FIG. 1 ,

FIG. 17 shows a partial section through the scoring assembly accordingto FIG. 16 , approximately along a line of section B-B, wherein inaddition a section through the handheld machine saw as a whole is shownin a smaller illustration to visualize the detail D3 shown in FIG. 17 ,

FIG. 18 shows a side view of the handheld machine saw according to theabove figures having open protective housing, approximatelycorresponding to the view according to FIG. 6 ,

FIG. 19 shows a cover of the protective housing diagonally from thefront, approximately in the perspective according to FIG. 1 ,

FIG. 20 shows a view similar to FIG. 18 of a variant of the handheldmachine saw,

FIG. 21 shows a further variant of the handheld machine saw from theside, approximately corresponding to the viewing direction BR1 in FIG. 1,

FIG. 22 shows the handheld machine saw according to the above figuresdiagonally from the front, wherein the protective housing is closedusing the cover according to FIG. 19 ,

FIG. 23 shows a front detail D4 of the view according to FIG. 22 havinga cover element adjusted into an open position,

FIG. 24 shows the view according to FIG. 23 , but having cover elementadjusted into a cover position,

FIG. 25 shows a subsection of the cover according to FIG. 19 havingcover element adjusted into the open position, corresponding to thepartial view according to FIG. 23 ,

FIG. 26 shows a view according to FIG. 25 , but having cover elementadjusted into cover position,

FIG. 27 shows the handheld machine saw according to FIG. 1 diagonallyfrom the rear to illustrate a scorer handle body,

FIG. 28 shows the handheld machine saw according to FIG. 27 diagonallyfrom the front,

FIG. 29 shows a variant of the handheld machine saw according to FIG. 27having an additional scorer handle body,

FIG. 30 shows the handheld machine saw according to FIG. 29 diagonallyfrom the front,

FIG. 31 shows a side view of the handheld machine saw according to theabove figures having a securing device in a securing position,

FIG. 32 shows a perspective diagonal view of the securing device of thehandheld machine saw according to FIG. 31 ,

FIG. 33 shows a schematic view of the handheld machine saw according tothe above figures from the side,

FIG. 34 shows a variant of the handheld machine saw according to FIG. 33having another driving device,

FIG. 35 shows a schematic view of a handheld machine saw having amanually and individually activatable scoring assembly,

FIG. 36 shows a handheld machine saw having a scoring assembly which isadjustable by a motor,

FIG. 37 shows a handheld machine saw having a scoring assembly manuallyactuatable via a force transmission element,

FIG. 38 shows a variant of the scoring assembly having alternativescorer depth setting means and an alternative deactivation device in aperspective diagonal view in a deactivation position,

FIG. 39 shows the scoring assembly according to FIG. 38 , but in theactivation position,

FIG. 40 shows a section along a line of section C-C in FIG. 39 throughthe scoring assembly,

FIG. 41 shows an exploded illustration of the scoring assembly accordingto FIGS. 38-40 ,

FIG. 42 shows a scoring tool having four scoring teeth,

FIG. 43 shows a system comprising the scoring tool according to FIG. 42in section along a line of section D-D and a saw tool,

FIG. 44 shows a detail D5 from FIG. 43 ,

FIG. 45 shows the scoring tool according to FIG. 42 illustrateddiagonally in perspective,

FIG. 46 shows a scoring tool having three scoring teeth,

FIG. 47 shows a scoring tool having one scoring tooth, alternativelyhaving two scoring teeth,

FIG. 48 shows another embodiment of a scoring tooth of a scoring tool,approximately corresponding to the detail D5 according to FIG. 44 ,having secondary cutting edge sections angled in relation to oneanother,

FIG. 49 shows an alternative embodiment of a scoring tooth,approximately like the scoring tooth according to FIG. 48 , but havingconcave secondary cutting edges,

FIG. 50 shows a further embodiment of a scoring tooth having convexsecondary cutting edges, and

FIG. 51 shows a saw tool from the side.

A handheld machine saw 10 is designed, for example, like a plunge saw,but could also have, for example, a retractable hood or similar otherprotective cover and can thus be a portable circular saw.

The handheld machine saw 10 has a saw assembly 11 having a saw drivemotor 12, which is accommodated in a motor housing part 28 of a sawassembly housing 13. The saw drive motor 12 drives, directly or via agearing not visible in the drawing, a saw toolholder 14, on which a sawtool 15 is arrangeable or arranged. For example, a holding screw or aholding element 14A is used to hold the saw tool 15 on the sawtoolholder 14.

The saw assembly 11 is pivotable as a whole around a depth setting axisTS with respect to a guide device 17, on which the saw assembly 11 isarranged, by means of a saw depth setting bearing 16. By way of such apivot movement, the saw tool 15 is settable between an upper depthsetting position OT and multiple lower depth setting positions, forexample, a lowermost depth setting position UT according to FIG. 2 or 8. In the lower depth setting positions UT, the saw tool 15 protrudes infront of a guide surface 19 of a guide body 18 of the guide device 17,for example, to introduce a saw cut into a workpiece W.

The guide body 18, and therefore the handheld machine saw 10 as a whole,can be guided with the guide surface 19, for example, directly along aworkpiece upper side WO of the workpiece W in a working direction AR.The guide surface 19 extends with a longitudinal axis L parallel to theworking direction AR.

The guide body 18 can also, for example, be guided along an upper sideor guide surface 202 of a guide rail 200, however, which can be laidwith its lower side 201 on the workpiece W. Particularly exact andstraight saw cuts can thus be introduced into the workpiece W.

The guide rail 200 has a longitudinal shape having long narrow sides203, 204 extending along a longitudinal axis LS of the guide rail 200,along which the working direction AR is oriented, between rear end face207 in the working direction AR and a front end face 208 in the workingdirection AR. The saw tool 15 can plunge into the workpiece W past thelong narrow side 204.

Furthermore, a counter guide contour 206 in the form of a longitudinalrib and optionally a receptacle groove 205 extend in parallel to thelongitudinal axis LS. The receptacle groove 205 is used, for example, toaccommodate aids, clamping devices for clamping the guide rail 200, orthe like. The longitudinal rib or guide contour 206 protrudes upwardfrom the guide surface 202 and is used to engage in a guide contour 216on the guide surface 19 of the guide body 18. The guide contour 216 isdesigned, for example, as an elongated receptacle groove 217 extendingalong the longitudinal axis L of the guide body 18.

An alternative embodiment of the guide rail 200 is schematically shown,for example, in the form of the guide rail 200A. The guide rail 200A hasan engaging-behind projection 210, which protrudes from the guidesurface 202 and from which at least one engaging-behind leg 211,preferably two engaging-behind legs 211 opposite to one another,laterally protrude transversely, and form a T-shaped structure, forexample. The engaging-behind legs 211 engage in a receptacle 220optionally provided on the guide surface 19, which has engaging-behindreceptacles 221. For example, in the plane of the guide surface 19,support legs 222 protrude in the direction of the receptacle 220, behindwhich the engaging-behind legs 211 can engage, which engage in theengaging-behind receptacles 221. The guide device 17 is thus held in aforce direction perpendicular to the guide surface 18 on the guide rail200A, but at the same time is displaceable along the working directionAR on the guide rail 200A, however. The receptacle 220 and theengaging-behind projection 210 have an elongated form and extend in thedirection of the longitudinal axes L or LS.

The guide body has a long side referred to hereinafter as the tool longside 18A, on which the saw tool 15 is arranged, and a so to speaktool-free long side 18B, which extends in parallel to the long side 18Aand, like this, extends between a front and a rear end face 18C, 18D ofthe guide body 18.

The saw assembly 11 is arranged on an upper side 19A of the guide device17 or the guide body 18 opposite to the guide surface 19. The guide body18 is formed, for example, by a guide plate or is platelike. While theguide surface 19 is essentially a planar surface, except for receptaclecontours arranged thereon, in particular, for example, the receptacle220 and/or guide contour 216, the upper side 19A can bear functionalcomponents and/or can be reinforced by a rib structure. Inter alia, itis possible that an operator grasps and/or actuates the upper side 19Ato guide the handheld machine saw 10, in particular in the region of ahandle part 18F to the front end face 18C, for example, to apply a forcedirection perpendicular to the guide surface 19 in the direction of theworkpiece W or the guide rail 200 to the front section of the guide body18. The handle part 18F can be or comprise, for example, a planarsurface. The handle part 18F advantageously has a recessed grip.However, the handle part 18F can also comprise a grip element 218, forexample, a rod-shaped or toggle-shaped handle.

The saw assembly 11 as a whole is applied in the direction of the upperdepth setting position OT by means of a saw assembly spring arrangement20. The saw assembly spring arrangement 20 comprises, for example, acoiled spring 20A. The coiled spring 20A or spring assembly 20 supportsitself, on the one hand, on the upper side 19A of the guide device 17,on the other hand, on the lower side of the saw assembly housing 13.

In addition to the depth adjustability around the depth setting axis TS,the saw assembly 11 can also be pivoted around a miter axis G.

The handheld machine saw 10 has a carrier 40. The carrier 40 comprises aprotective housing 29. The saw assembly 11 is held on the carrier 40.

The carrier 40 and/or the protective housing 29 is pivotably mounted onthe guide device 17 around the miter axis G, which extends in parallelto the longitudinal axis L of the guide device 17, namely by means of afront miter bearing 21 in the working direction AR and a rear miterbearing 23 in the working direction AR of a miter bearing arrangement21A. The miter bearings 21, 22 are arranged close to or immediately atthe front and rear end faces 18C, 18D of the guide body 18, thus so tospeak form the frontmost and rearmost component of the handheld machinesaw 10 in the working direction AR.

The miter bearings 21, 22 each comprise a bearing base 23, in particularlike a plate, which protrudes upward from the upper side 19A of thedevice 10, and on which a bearing body 24, preferably also designed as aplate, is pivotably mounted around the miter axis G.

The miter bearings 21, 22 are fixable in multiple pivot positions withrespect to the miter axis G by means of fixing means 25. The fixingmeans 25 comprise, for example, a clamping screw 25A, which can beapplied to the bearing base 23 and the bearing body 24 toward oneanother into a clamping position, so that they are held against oneanother in a friction-locked and/or frictional and/or formfittingmanner, for example, by means of intermeshing teeth, and fix the carrier40 in a set angle position with respect to the miter axis G on the guidedevice 17.

Alternatively to the concept of the carrier 40, on which the sawassembly 11 and the scoring assembly 31 are arranged, to be rotatablesimultaneously around the miter axis G by means of the miter bearingarrangement 21A, a concept is also possible in which the scoringassembly 31 can pivot independently of the saw assembly 11 around themiter axis G. For this purpose, for example, a miter bearing 22A isprovided between a scoring assembly 31A, corresponding to the scoringassembly 31, and the saw assembly 11, as in the exemplary embodiment ofthe handheld machine saw 10A according to FIG. 5 . Of course, it isadvantageous if this miter bearing 22A is also fixable by a fixing means25 like the miter bearings 21, 22, for example by a clamping screw, sothat the relative position of the saw assembly 11 and the scoringassembly 31 is fixable with respect to the miter axis G.

However, the embodiment according to FIG. 5 can also provide that thesaw assembly 11 can pivot around the miter axis G, but the scoringassembly 31A is arranged fixed in place with respect to the guide device17 with respect to the miter axis G. The miter bearing 22A is alsoadvantageously provided between the scoring assembly 31 and the sawassembly 11 in this case.

The carrier 40 comprises the protective housing 29 having a saw toolreceptacle space 48 for accommodating the saw tool 15. The saw tool 15is accommodated in a pivotably movable manner in the saw tool receptaclespace 48 so it is pivotable around the depth setting axis TS, wherein itdoes not protrude from the saw tool receptacle space 48 in the upperdepth setting position OT, but protrudes a maximum distance in front ofthe protective housing 29 and the guide surface 19 in the lower depthsetting positions, for example the lowermost depth setting position UT.

The saw toolholder 14 is rotationally driven by the saw drive motor 12around a tool axis of rotation DS with a rotational direction such thatthe saw tool 15 cuts into the workpiece W from its lower side WU andcreates a saw cut SAE. The saw tool 15 is a saw blade, the teeth ofwhich are inclined and driven in a rotational direction toward the guidesurface 19, so that the teeth can result in cracking upon exiting fromthe workpiece upper side WO. To prevent this problem, the handheldmachine saw 10 has a scoring module 30.

The scoring module 30 comprises a scoring assembly 31, which is arrangedin front of the saw assembly 11 in the working direction AR. The scoringassembly 31 is arranged, like the saw assembly 11, on the carrier 40. Ascorer drive motor 32 drives a scorer toolholder 34 around a tool axisof rotation DV, but with an opposite rotational direction in comparisonto the rotational direction of the tool axis of rotation DS. The scorerdrive motor 32 forms a scorer drive 32A.

A scoring tool 35, for example, a scorer saw blade, is detachablyfastenable on the scorer toolholder 34, in particular by means of aholding element 34A, in particular a holding screw. The scoring tool 35is driven in a rotational direction such that its teeth cut into theworkpiece W from its workpiece upper side WO and create a score RI,which is aligned with a saw cut subsequently produced by the saw tool 15in the workpiece W. The score is somewhat wider than the later saw cut,so that the saw tool 15 is not tangent to the longitudinal edges of thescore and thus no or less cracking, no or less tearing out of chips orthe like occurs on the workpiece upper side WO.

A scoring assembly housing 33 is arranged on the carrier 40, in whichessential components of the scoring assembly 31 are accommodated in aprotected manner. The scoring assembly housing 33 is therefore fixed inplace with respect to the carrier 40 and also with respect to theprotective housing 29, while the movable components of the scoringassembly 31, inter alia, the scorer drive motor 32, a gearing betweenthe scorer drive motor 32 and the scorer toolholder 34, etc., aremovably accommodated in the interior of the scoring assembly housing 33.The scorer drive motor 32 is advantageously accommodated in a motorhousing 33A separate from the scoring assembly housing 33. The motorhousing 33A is movable relative to the scoring assembly housing 33.

The scoring assembly 31 comprises a scorer carrier 80, which is mountedby means of a scorer depth setting bearing 36 around a depth settingaxis TV on the carrier 40. The scorer toolholder 34 is also accommodatedin the interior of the protective housing 29, namely in a scoring toolreceptacle space 49 thereof.

The scorer carrier 80 has, for example, a block-like or cuboid design.The scorer carrier 80 has, for example, an elongated form. Alongitudinal axis of the scorer carrier 80 or the scorer carrier 80 as awhole is inclined obliquely at a flat angle, for example, with respectto the guide surface 19 in dependence on his respective pivot positionwith respect to the depth setting axis TV or in some pivot positions isparallel to the guide surface 19 with respect to the depth setting axisTV.

The scorer carrier 80 comprises a bearing section 81 on mutuallyopposing longitudinal end regions, which is mounted on the scorer depthsetting bearing 36 around the depth setting axis TV, and a motor section82 having a motor receptacle 83, on which the scorer drive motor 32 isheld. A gearing 84 can be arranged between the scorer drive motor 32 andthe scorer toolholder 34, for example, a stepped gearing or the like.For example, it is possible that due to the gearing 84, the tool axis ofrotation DV and a motor axis of rotation DM of the scorer drive motor 32have a transverse distance in relation to one another. For example, themotor axis of rotation DM has a greater distance to the guide surface 19than the tool axis of rotation DV, which is thus very close to the guidesurface 19. It is thus possible, for example, that the scorer drivemotor 32 has a greater diameter for generating a correspondingly greatertorque than in a design in which its motor axis of rotation and the toolaxis of rotation DV are aligned with one another.

To actuate the saw toolholder 14 between the upper depth settingposition OT and one of the lower depth setting positions UT, the sawassembly 11 as a whole is to be pivoted around the depth setting axisTS. For this purpose, an operator can grasp, for example, handles 26and/or 27 arranged on the saw assembly housing 13. The handle 26 isarranged at the rear on the saw assembly 11 in the working direction AR,the handle 27 is arranged at a front region of the saw assembly housing13 on the saw assembly 11 in the working direction AR. Both handles 26,27 have an elongated form. The handle 26 as a longitudinal axis L 26,which extends essentially in parallel to the longitudinal axis L of theguide device 17, while a longitudinal axis L27 of the handle 27 extendstransversely to this longitudinal axis L. The operator can thus, forexample, generate a torque around the depth setting axis TS by pressingon the handle 27, whereby the saw toolholder 14 pivots around the depthsetting axis TS and the saw tool 15 is moved in front of the guidesurface 19.

The handle 27 simultaneously forms an actuating element 27A, using whichan operator not only can actuate the saw assembly 11 or the sawtoolholder 14 between its depth setting positions, but moreover also thescoring assembly 31. The actuating element 27A, thus an actuating handle27B, acts via a driving device 70 on the scoring assembly 31 for itsadjustment between an active position AP, in which the scoring tool 35protrudes in front of the guide surface 19, and an inactive position IP,in which the scoring tool 35 is adjusted behind the guide surface 19 orin any case does not protrude in front of it.

The scorer carrier 80 and thus the scorer toolholder 34 is loaded by ascoring assembly spring arrangement 39 in the direction of the inactiveposition IP. In contrast, in the opposite direction, thus in the activeposition AP, the driving device 70 carries along the scoring assembly 31when the saw assembly 11 is actuated from the upper depth settingposition OT in the direction of the lower depth setting position UT.Upon adjustment of the handheld machine saw 10 into a lower depthsetting position or sawing position, an operator thus so to speakoperates against the two spring arrangements 20, 39 to adjust both thesaw tool 15 and also the scoring tool 35 into a working position orsawing position engaging in the tool W. In the opposite direction, so tospeak into the inactive position or secure position, the two springarrangements 20, 39, which both act in a safe sense, namely in a senseto adjust the saw tool 15 and the scoring tool 35 behind the guidesurface 19.

The driving device 70 comprises an actuation generator 71 on the sawassembly 11, which acts on an actuation acceptor 72 of the scoringassembly 31. The actuation generator 71 is designed as a link guide 73and comprises a guide link 74, along which a link follower 75, forexample a roller or touch roller, of the scoring assembly 31 is guided,for example rolls along. The actuation generator 71 and the actuationacceptor 72 are advantageously arranged outside the protective housing29.

The guide link 74 comprises a scorer activation section 76 and a scorerholding section 77, between which a vertex 76A is arranged. The scorerholding section 77 of the guide link 74 or link track extends in aradius R around the depth setting axis TS. The scorer activation section76, in contrast, extends at an angle to the scorer holding section 77 inany case in such a way that the link follower 75 guided along theholding section 77 actuates the scoring assembly 31, in particular thescorer carrier 80, in a direction that the scorer toolholder 34 and thusthe scoring tool 35 is actuated out of the inactive position IP along amovement path BB in the direction of the active position AP.

The scorer activation section 76 is designed in such a way that upon anadjustment of the saw toolholder 14 out of the upper depth settingposition OT in the direction of the lower depth setting position UT, thescoring tool 35 is adjusted leading in front of the saw tool 15 out ofthe inactive position IP into the active position AP, in which itprotrudes in front of the guide surface 19 with a preferably settablemaximum penetration depth or scoring depth Rmax to engage in theworkpiece W. The scoring depth Rmax or the active position AP is alreadyset or settable when the saw tool 15 or the saw toolholder 14 or the sawassembly 11 assumes a depth setting position RT, in which the saw tool15 does not yet protrude in front of the guide surface 19. This settingof the handheld machine saw 10 relates to solely scoring operation orscorer operation, in which only the scoring assembly 31 or scoring tool35 is used to introduce a score into the workpiece W.

In order that the operator does not have to so to speak balance out thesaw assembly 11 in the depth setting position RT by hand in this solelyscoring operation or scoring unit operation, an only-scoring depth stopdevice 78 is provided. This comprises a stop element 79 movably mountedon the saw assembly 11, for example movable by sliding, which isadjustable between a stop position TA, in which it stops on a counterstop 79A, which is arranged on the protective housing 29, and a releaseposition TF, in which the stop element 79 is movable past the counterstop 79A, to actuate the saw assembly 11 and thus the saw toolholder 14out of the scorer depth setting position RT farther in the direction ofone of the lower depth setting positions UT, in which the saw tool 15protrudes in front of the guide surface 19 to cut into the workpiece W.For example, the stop element 79 is displaceably mounted transversely tothe longitudinal axis L on the motor housing part 28 or saw assemblyhousing 13.

The stop element 79 is advantageously arranged close to the handle 26,in particular at its upper region most remote from the guide device 17,so that an operator grasping around the handle 26 can actuate the stopelement 79 with his thumb in a slide guide (not designated in greaterdetail) between the stop position TA and the release position TF.

Furthermore, a main switch actuating element 60 for actuating a mainswitch 60A, using which the saw drive motor 12 and the scorer drivemotor 32 can be switched on and switched off, is arranged at this upperregion of the handle 26 or region most remote from the guide device 17.

The handheld machine saw 10 is connectable, for example, by means of anattachment line 67 to an electrical power supply grid, for example an ACvoltage grid at 120 V, 230 V, or the like, for the electrical powersupply of the drive motors 12, 32 and other electrical components of thehandheld machine saw 10.

Alternatively or additionally to the supply via an electrical powersupply grid, for example, an electrical energy storage device 67D, forexample an accumulator, can also be provided for the power supply of thesaw assembly 10 and/or the scoring assembly 31.

For the power supply of the scoring assembly 31 by the saw assembly 11,a connecting line 68 is provided. The connecting line 68 is connectedusing attachment sections 68A, 68B at its longitudinal ends, on the onehand, to the saw assembly 11, on the other hand, to the scoring assembly31. An arc-shaped connecting section 68C or arc section extends betweenthe attachment sections 68A, 68B.

However, it is also possible that the scoring assembly 31 can besupplied with electrical energy by means of an electrical energy storagedevice 68D arranged, for example, on or in the scoring assembly housing33.

The connecting section 68C extends starting from the longitudinal ends68A, 68B in an arc shape in the direction of the protective housing 29,so that an intermediate space is provided between the longitudinal lens68A, 68B, which is optimally suitable for operating components of thescoring assembly 31.

In particular, a scorer handle body 37 is accessible through theintermediate space between the attachment sections 68A, 68B or theinterior of the connecting section 68C, using which an operator canexert an actuating force in the direction of the guide surface 19 in theregion of the scoring assembly 31. The scorer handle body 37 has ahandle surface 37A, which is provided in particular on a cover wall 38of the scoring assembly housing 33. This is because the scoring assemblyhousing 33 forms the scorer handle body 37.

A recessed grip 37B and a planar surface 37C are provided on the handlesurface 37A. A handle bulge 37D extends above the recessed grip 37B,which has, for example, an outer circumferential contour matching withthe palm of an operator.

The housing 33 furthermore has a side wall 38A, which extends adjacentto the long side 18B of the guide body 18, and a front wall 38B, whichextends in parallel to the front end face 18 of the guide body 18.

Since the housing 33 of the scoring assembly 31 is fixedly arranged onthe carrier 40, it does not pivot around the depth setting axis TV, butis pivot-fixed with respect to the depth setting axis TV. To guide thehandheld machine saw 10 in the working direction AR, an operator canthus support himself on the housing 33, in particular its cover wall 38,and exert a force in the direction of the guide surface 19 and/or in theworking direction AR on the handheld machine saw 10. The housing 33 hasa support part 38D for support on the upper side 19A of the guide body18.

The housing 33 is advantageously designed ergonomically favorably. Forexample, the cover wall 38 is inclined obliquely to the rear at a smallangle with respect to the working direction AR, so that the operator canexert an operating force in the working direction AR toward the front onthe housing 38 and thus the handheld machine saw 10. The cover wall 38or the housing 33 advantageously has a handle bulge 38C. The handlebulge 38C is also suitable for the purpose of accommodating the scorerdrive motor 32 beneath it. The operator can support himself on thehandle bulge 38C or grasp around it, for example, with his palm. Aparticularly ergonomic operating concept thus results.

A schematically indicated operator BE can thus, for example, grasparound the handle 26 with a hand to guide the handheld machine saw 10,in order to also actuate the main switch 60 and the actuating element61A with his hand, and with his other hand to optionally either graspthe handle 27, which is shown as a hand position H1 in FIG. 28 , or cansupport himself on the scorer handle body 37 or housing 38, which isshown as the hand position H2.

An alternative operating concept or an operating concept provided inaddition to the handle 37 provides an additional scorer handle body 337.The handle body 337 is, for example, rod-shaped and has a handle surface337A to be grasped around by the operator BE. The handle body 337 isfastened by means of a carrier 337B on the protective housing 29 andprotrudes from it in the direction of the scoring assembly 31.

The scoring assembly 31 is arranged between the handle body 337 and theguide body 18, wherein an intermediate space Z, through which anoperator can grasp around the handle body 337, is provided between thehandle body 337 and the upper side of the housing 33 of the scoringassembly 31 facing away from the guide body 18.

Both handle bodies 37 and 337 extend along a longitudinal axis L38transverse to the longitudinal axis L of the guide body 18, inparticular perpendicularly transverse. Both handle bodies 337 and 37preferably extend up to the so to speak tool-free long side 18B of theguide body 18. Both handle bodies 37 and 337 preferably extend overessentially the entire transverse width of the guide body 18 from thelong side or narrow side 18B in the direction of the long side 18A, onwhich the tools 15, 35 are arranged, so that they provide the operatorwith an ergonomic support for guiding the handheld machine saw 10.

Furthermore, the saw assembly 11 or the saw toolholder 14 is lockable bymeans of a locking device 61 in the upper depth setting position OT. Anactuating element 61A of the locking device 61, designed, for example,as a pressure actuating element, is arranged on the upper region orregion most remote from the guide device 17 of the handle 26. Byactuation of the actuating element 61A, it can be disengaged from abuttress contour 61B, for example engaging-behind contour, so that thesaw assembly 11 is unlocked for adjustment from the upper depth settingposition OT into one of the lower depth setting positions UT or thescorer depth setting position RT.

The scorer depth setting position RT and other lower depth settingpositions UT are also settable by means of a saw depth setting device 62of the handheld machine saw 10. The saw depth setting device 62comprises a depth stop guide 63, which extends in an arc shape aroundthe saw depth setting bearing 16.

It is advantageous if the guide link 74, which also extends in an arcshape around the depth setting axis TS at least in the region of thescorer activation section 76, is arranged adjacent to the depth stopguide 63.

A depth stop 64 is adjustably mounted in various depth settingpositions, for example displaceably, on the depth stop guide 63. Thedepth stop guide 63 comprises, for example, a guide groove, a guideslot, or the like. The depth stop 64 is fixable in place with respect tothe depth stop guide 63 by means of a fixing unit 65, for example adetent fixing unit.

A stop body 66 is arranged on the saw assembly 11 movable around thedepth setting axis TS, which protrudes in the direction of the depthsetting stop 64 and stops thereon in the respective depth settingposition set by it.

The scoring assembly 31, in particular its scorer carrier 80, ispivotably mounted on the carrier 40 pivotable around the miter axis Garound the depth setting axis TV by means of the scorer depth settingbearing 36. The scorer depth setting bearing 36 comprises a bearing base86, which is fastened on the carrier 40. The bearing base 86 comprises asupport plate 86A, for example a flange or flange body, from which anaxis element 86B protrudes. The support plate 86A is fastened usingscrews 86C on a base wall 29A of the protective housing 29, so that theaxis element 86B protrudes from the base wall 29A.

A bearing sleeve 86E is arranged on the outer circumference of the axiselement 86B, on the outer circumference of which a bearing element 86Fis in turn arranged. The bearing sleeve 86E thus engages in a bearingreceptacle of the bearing element 86F, so that the bearing element 86Fis pivotably mounted by means of the bearing sleeve 86E around the depthsetting axis TV. The bearing element 86F is, for example, fixedlyconnected to the scorer carrier 80, for example accommodated in areceptacle thereof.

The bearing sleeve 86E represents an option which improves the abilityto rotate or pivot around the depth setting axis TV. Moreover, thebearing sleeve 86E improves a longitudinal displaceability of the scorercarrier 80 and thus of the scoring assembly 31 with respect to atransverse adjustment axis QS, in order to align the scorer toolholder34 with respect to the saw toolholder 14 and thus the scoring tool 35with respect to the saw tool 15 in an axial line aligned with oneanother, so that the score produced by the scoring tool 35 aligns withthe saw cut produced by the saw tool 15. It is advantageous that thetransverse adjustment axis QS simultaneously corresponds to the depthsetting axis TV.

A transverse adjustment device 87 is used to adjust the scorertoolholder 34 with respect to the transverse adjustment axis QS. Thetransverse adjustment device 87 comprises as a positioning element 87A,for example, a positioning screw, the head of which represents anactuating element 87B. A ribbing or similar other handle whichfacilitates the operation for the operator BE can be provided on theradial outside, for example, on the actuating element 87B. A screwsection 87C engages in a positioning receptacle 86D of the axis element86B and is screwed together therewith. Therefore, by rotating thepositioning screw or the positioning element 87A, the position of theactuating element 87B can be adjusted along the transverse adjustmentaxis QS. The screw section 87C is thus so to speak screwed into thepositioning receptacle 86D or unscrewed from it.

The actuating element 87B protrudes in front of the axis element 86Bwith a projection protruding radially in front of the transverseadjustment axis QS, for example a flange projection, so that the bearingsleeve 86E and/or the bearing element 86F can support itself on thisprojection. The actuating element 87B thus carries along the bearingelement 86F as the screw section 87C is screwed into the positioningreceptacle 86D in the direction of the support plate 86A of the bearingbase 86 along the transverse adjustment axis QS and thus adjusts thescorer toolholder 34 in a direction away from the tool long side 18A ofthe guide body 18.

A spring 86H acts opposite to this positioning direction, which supportsitself on one side on the support plate 86A and on the other side on thebearing element 86F and thus acts with a force in the direction towardthe actuating element 87B. The spring 86H engages in a spring receptacle86G of the bearing element 86F, which is designed, for example, as acircumferential groove that extends around the transverse adjustmentaxis QS. The spring 86H is penetrated by the bearing element 86F, thebearing sleeve 86E, and the axis element 86B.

By rotating the actuating element 87B around the transverse adjustmentaxis QS, the position of the scorer toolholder 34 and thus of thescoring tool 35 is adjustable with respect to the longitudinal axis L ofthe guide body 18 and/or a cut axis producible by the saw tool 15 indirections opposite to one another with respect to the transverseadjustment axis QS, for example, out of a middle location by at most 2.5to 4 mm in each direction.

A detent device 88 is used for fixing, in particular rotationallyfixing, the actuating element 87B or the positioning element 87A. Thedetent device 88 comprises a clamp-like spring 88A or alternatively188A, on the free ends of which detent elements 88B are formed. Thedetent springs 88B, 188B engage in detent receptacles 88C in a lockingmanner, which are arranged on the radial outer circumference of theactuating element 87B with respect to the transverse adjustment axis QS.By rotating the actuating element 87B, the detent elements 88B move outof the one detent receptacle 88C and engage in the closest adjacentdetent receptacle 88C in the circumferential direction. The detentdevice 88 thus fixes the transverse adjustment device 87 with respect toa respective set transverse setting of the scorer toolholder 34.

The actuation acceptor 72 is arranged on an actuation acceptor arm 90,namely on its free end region. A pivot bearing 90A for a wheel 90B isarranged there, which can rotate around an axis of rotation D90 by meansof the pivot bearing 90A at the free end region of the actuationacceptor arm 90 and represents the link follower 75. The wheel 90 canthus roll along the guide link 74.

The actuation acceptor arm 90 is pivotably mounted using a bearingsection 91 around a pivot axis, which corresponds to the depth settingaxis TV in the present case, with respect to the scorer carrier 80 ofthe scoring assembly 31, so that the link follower 75 has a differentangle positions in dependence on the pivot position of the actuationacceptor arm 90 with respect to the depth setting axis TV or withrespect to the scorer carrier 80, so that by pivoting the actuationacceptor arm 90 with respect to the scorer carrier 80, differentpenetration depths of the scoring tool 35 into the workpiece W ordifferent distances at which the scoring tool 35 protrudes in front ofthe guide surface 19 in the active position AP are settable. Theactuation acceptor arm 90 therefore forms a component of scorer depthsetting means 95.

An actuating arm 92 protrudes at an angle from the actuation acceptorarm 90 from the bearing section 91. An actuating surface 92A is providedon the actuating arm 92, on which a positioning body 93 acts. Byadjusting the relative position of the positioning body 93 with respectto the actuating surface 92A, the actuation acceptor arm 90 and thus thelink follower 75 can be adjusted in such a way that it has differentactuation distances BA to the scorer toolholder 34. This is because thelink follower 75 and thus the actuation acceptor 72 and the scorertoolholder 34 protrude like arms from the bearing section 81 of thescorer carrier 80 on mutually opposing sides.

The positioning body 93 supports the actuating arm 92 against the forceof a spring arrangement 94. The spring arrangement 94 comprises a coiledspring 94A, which is secured on one side on the scorer carrier 80 and onthe other side on the actuation acceptor arm 90 and impinges it in adirection toward the carrier 90 or the scorer toolholder 34. Incontrast, the positioning body 93 acts in the opposite direction, thusin the direction of an adjustment of the actuation acceptor arm 90 fromthe scorer carrier 80 and thus in the direction of enlarging theactuation distance between the actuation acceptor 72 and the scorertoolholder 34.

The positioning body 93 is displaceably mounted with respect to thescorer carrier 80 along an axis SA. Moreover, the positioning body 93 isdisplaceably mounted transversely to the axis SA, in the present caseperpendicularly transversely, along an axis SB, wherein this degree ofmovement freedom is assigned to the scorer depth setting means 95.

The positioning body 93 has a longitudinal end 93A, on which apositioning surface 93B is arranged to engage with the actuating surface92A of the actuating arm 92. A middle section 93C of the positioningbody 93, on which it has a positioning contour 93D, extends between thelongitudinal end 93A and an actuating end 93B.

The positioning body 93 is displaceably mounted with respect to thepositioning axis SA on a bearing body 96 designed, for example, as ahousing. For example, the bearing body 96 has bearing receptacles 96A,96C, which are arranged on walls or bearing sections 96B, 96D of thebearing body 96. The middle section 93C of the positioning body 93extends between the bearing receptacles 96A, 96C, wherein thepositioning body 93 protrudes on mutually opposing sides in front of thebearing body 96, namely on one side with the positioning surface 93B,which is engaged with the actuating surface 92A of the actuating arm 92,and on the other side with an actuating end or actuating element 93E, onwhich a grip surface or similar other positioning surface for actuationby an operator is arranged.

Specifically, for example, an operator can pull on the actuating element93E in the direction of the positioning axis SA, whereby the positioningbody 93 is disengaged from the actuating surface 92A, so that the springarrangement 94 can actuate the actuating arm 90 out of an activationposition AK away from the guide link 74 into a deactivation position DK.In the deactivation position DK, the link follower 75 is disengaged fromthe guide link 74 and has, for example, a distance F to guide link 74(FIG. 7 ), so that the driving coupling of the driving device 70 betweenthe saw assembly 11 and the scoring assembly 31 is canceled. The sawassembly 11 can thus be adjusted between its depth setting positions OTand UT, without the scoring assembly 11 being adjusted around the depthsetting axis TV. The scoring tool 35 remains adjusted behind the guidesurface 19, thus inactive.

The positioning body 93 thus forms a component of a deactivation device97 for deactivating or activating the driving device 70.

The positioning body 93 is loaded by a spring 96E in its activationposition AK. The spring 96E supports itself, for example, on thepositioning body 93, for example, on a step close to the center section93C, and on the wall 96D of the bearing body 96.

At the actuating end or actuating element 93E, a rotation lock 93F fixedin place with respect to the scorer carrier 80 is preferably provided,for example, a planar surface, on which the actuating end 93F issupported in a non-rotatable manner with respect to the positioning axisSA.

The positioning contour 93D forms a component of the scorer depthsetting means 95. The positioning contour 93D of the positioning body 93arranged on the radial outer circumference of the middle section 93C isengaged with a positioning receptacle 98, the position of which isadjustable along the positioning axis SB and thus transversely to thepositioning axis SA by means of a depth setting element 99, for examplea positioning screw. An operator can actuate the depth setting element99 by means of an actuating element 99A.

Alternatively, it would be possible that the positioning body 93 ispivotably mounted around the positioning axis SA and the positioningcontour 93D represents an eccentric contour, so that by pivoting thepositioning body 93 around the positioning axis SA, parts of thepositioning contour 93D protruding different distances radially in frontof the positioning axis SA are supported on the positioning receptacle98 and thus the positioning surface 93B of the positioning body 93assumes different positions with respect to the positioning axis SB.

The depth setting element 99 comprises, for example, an actuatingelement 99A, for example a head, from which a screw section 99Bprotrudes, which is rotatably mounted on a component fixed in place withrespect to the scorer carrier 80, for example the bearing body 96, andis screwed into a body 98A providing the positioning receptacle 98.

By way of a screw actuation of the depth setting element 99, atransverse position of the positioning receptacle 98, which is U-shaped,for example, is adjustable transversely to the positioning axis SA, forexample, along a positioning axis SB, whereby the position of thepositioning surface 93B and thus the actuating surface 92A of theactuating arm 92 pressing thereon is adjusted transversely to thepositioning axis SA at the same time.

The positioning body 93 is accommodated displaceably along thepositioning axis SA in the positioning receptacle 98, so that the scorerdepth setting means 95 maintain the respective set depth settingposition, even if the deactivation device 97 is actuated, in that thepositioning body 93 is displaced along the positioning axis SA.

An intermediate space 33B is provided with respect to the longitudinalaxis L of the guide device 17 or the guide body 18 between the scoringassembly housing 33 forming a scorer handle body 37 and the saw assemblyhousing 13, in which one or more actuating elements of the scoringassembly 31 provided for actuation by an operator are convenientlyaccessible for the operator, for example, the actuating element 93E ofthe deactivation device 97, the actuating element 87B of the transverseadjustment device 97, or the actuating element 99A of the scorer depthsetting means 95.

The handheld machine saw 10 is short with respect to the longitudinalaxis L of its guide body 18, thus between the end faces 18C, 18D. Thisis achieved, inter alia, by the compact scoring module 30 or scoringassembly 31. Furthermore, it is advantageous that the depth setting axisTV is arranged between the toolholders 14 and 34. The handheld machinesaw 10 is therefore not so to speak top-heavy in its front region in theworking direction AR, but rather extremely short.

The arrangement of the toolholders 14, 34 and thus of the saw tool 15and the scoring tool 35 close to or directly at the long side 18A of theguide body 18 also contributes to the user-friendliness of the handheldmachine saw 10. Inter alia, the two tools 15, 35 are thus well visibleat their penetration region into the workpiece W. Moreover, the miteraxis G extends directly adjacent to the long side 18A, so that the tools14, 35 can pivot optimally around this long side 18A, but also aroundthe long narrow side 204 of the guide rail 200, 200A.

Furthermore, an advantageous suction concept for dust, particles, andthe like, which arise during the sawing and scoring of the workpiece W,is ensured in the handheld machine

The saw tool receptacle space 48 and the scoring tool receptacle space49 are provided with a sawdust removal device 48A and a scorer dustremoval device 49A. The receptacle spaces 48, 49 extend up to the guidesurface 19, where the saw tool 15 protrudes in one of the lower depthsetting positions UT and the scoring tool 35 protrudes in its activeposition AP out of the respective receptacle space 48, 49 in front ofthe guide surface 19. The dust removal devices 48A, 49A are arranged ina flow connection with a dust removal fitting 52, which is arranged atthe rear in the working direction AR on the handheld machine saw 10, inparticular on the top rear of the protective housing 29. A suction hoseSL of a suction device SV, for example, a workshop suction unit, isconnectable to the dust removal fitting 52, which is designed, forexample, as a connecting piece, to suction off dust, particles, or thelike arising during the sawing operation of the handheld machine saw 10.

The protective housing 29 has a protective housing part 40A, which isfixed in place with respect to the carrier 40, and which is covered by aprotective housing cover 41 which is advantageously removable from theprotective housing part 40A for maintenance purposes. The receptaclespaces 48, 49 for the top parts of the tools 15, 35 with respect to theguide device 17 are formed between the protective housing part 40A andthe protective housing cover 41. The protective housing part 40A has,for example, a base wall 29A, which is opposite to a cover wall 42 ofthe protective housing cover 41.

A recess 42A is provided between the base wall of 29A and the cover wall42, through which the tools 15, 35 are movable out of the protectivehousing 29, so that they protrude in front of the guide surface 19. Anobliquely inclined wall section 42B of the cover wall 42 extendsadjacent to the recess 42A, which is obliquely inclined in such a waythat a transverse distance between the cover wall 42 and the base wall29A is reduced in the region of the recess 42A and/or is less than in aregion of the saw tool receptacle space 48 more remote from the guidesurface 19, in which the saw tool receptacle 14 is arranged.

Angled side walls 43C, 43 and 44C, 44 protrude from the base wall 29Aand the cover wall 42, which press against one another at the end facesand interlock, so that the side walls 43-44 delimit the receptaclespaces 48, 49. The side walls 43C, 43 are, for example, rear side wallsin the working direction AR. The side walls 44C, 44 extend along anupper section or section most remote from the guide device 17 of theprotective housing 29 and on a front section of the protective housing29 in the working direction AR.

The protective housing 29 has a projection 45, in which the scoring toolreceptacle space 49 is provided. The cover wall 42 extends up to theprojection 45. A side wall 46 protrudes there from the cover wall 42 ona side facing away from the guide device 17 and a side wall 47 protrudesat an angle forward in the working direction, thus in orientation towardthe end face 18C, which press at the end faces on the protective housingpart 40A fixed in place with respect to the carrier 40, so that overallthe projection 45 also provides a closed scorer receptacle space 49toward the guide surface 19, except for a passage opening for thescoring tool 35.

It would be possible in principle to suction off the two receptaclespaces 48, 49 without further fluidic measures via the dust removalfitting 52. However, it is not considered here that the scoring tool 35,when it cuts into the workpiece upper side WO, throws particles towardthe saw tool 15, which would significantly worsen a view of the frontcutting edge of the saw tool 15 in the working direction AR. Severalmeasures described hereinafter are advantageous to remedy theseproblems.

To suction off dust, particles, or the like, a dust removal duct 50extends on a region of the protective housing 29 facing away from theguide device 17. The dust removal duct 50 is delimited, on the one hand,by the side walls 44, 44C, on the other hand by intermediate walls 51,51C opposite thereto on the cover 41 or protective housing part 40A,respectively. The dust removal duct 50 extends from a front region ofthe saw tool 15 in the working direction AR to the dust removal fitting52 arranged at the rear in the working direction AR.

It would be possible in principle that the scoring tool receptacle space49 communicates directly with the dust removal duct 50. However, the sawtool receptacle space 48 is advantageously provided with a partition,namely in the form of a partition wall 55, from the scoring toolreceptacle space 49 at least in that region where the saw tool 15 andthe scoring tool 35 are directly opposite, namely close to the guidesurface 19. The partition wall 55 advantageously has a partition wallpart 55C fixed in place with respect to the protective housing 29, forexample, the protective housing part 40A. The partition wall 55, inparticular the partition wall part 55C, extends up to the guide surface19 and thus stands between the saw tool 15 and the scoring tool 35.

On a side facing toward the scoring tool 35, the partition wall part 55Cor the partition wall 55 advantageously has a flow guiding surface 55E,for example, inlet bevel or baffle 55D, on which the particles generatedby the scoring tool 35 strike and are deflected in the direction of thedust removal duct 50, and thus do not continue to flow toward the sawtool 15.

At a region of the partition wall section 55C remote from the guidesurface 19, the scoring tool receptacle space 49 opens at an outflowopening 52C into the dust removal duct 50, so that the particlesgenerated by the scoring tool 35, which are indicated in FIG. 18 as aparticle flow PV by black arrows, mix with a particle flow PSrepresented by white arrows, which contains particles generated by thesaw tool 15.

An alternative concept, in which the above-mentioned partition wall 55between scoring tool 35 and saw tool 15 is also advantageous andprovided, is indicated in FIG. 21 . However, the receptacle spaces 48,49 are completely separated from one another therein and the scoringtool receptacle space 49 has a dust removal fitting 52B separate fromthe dust removal fitting 52 for removing the particles of the scoringassembly 31, to which a farther suction hose SL2 is connectable. Forexample, a connecting piece for connecting the suction hose SL2 isprovided on the dust removal fitting 52B, which is also fluidicallyconnected to the suction device SV, for example, to generate a particleflow PV conveying away particles of the scoring assembly 31. Via thedust removal fitting 52, the particles generated by the saw tool 15 flowas a particle flow PS separate from the particle flow PV to the suctiondevice SV.

Formfitting contours 52A, for example rotational formfitting contours,plug-in formfitting contours, etc., are provided on the dust removalfittings 52, 52B for the formfitting hold of the suction hoses SL, SL2.Furthermore, it is advantageous if the dust removal fittings 52, 52Bhave pivot bearings 52D, so that the suction hoses SL, SL2 are rotatablymounted on the handheld machine saw 10.

Solely due to the arrangement of toolholders 14, 34 and thus the tools15, 35 directly on the so to speak free long side 18A of the guide body17, optimum visibility of these tools is already provided. A viewingwindow 54 on the cover wall 42, in particular on its lower edge regionclose to the guide surface 19, is furthermore advantageous.

The viewing window 54 is arranged on a region of the cover wall 42,where the scoring tool 35 is opposite to the saw tool 15. Both tools canthus be seen through the viewing window 54.

The viewing window 54 could be closed by a fixed, transparent wall, forexample made of plastic, so that receptacle spaces 48, 49 would beclosed by this wall. However, in the present case a cover element 53 isprovided, in particular a window body or window cover element.

The cover element 53 has a saw tool section 53A and a scoring toolsection 53B, which are assigned to the saw tool 15 or scoring tool 35,respectively, and are each opposite thereto, in any case when the coverelement 53 is adjusted into a cover position ABS, in which it concealsthe viewing window 54.

The cover element 53 is adjustable by means of a bearing 53D, inparticular a slide bearing, on the cover wall 42 between the coverposition ABS and an open position OS, in which it at least partiallyexposes the viewing window 54, in particular its section facing towardthe guide surface 19. An actuating contour 53C, for example a rib or thelike, is advantageously provided for grasping the cover element 53. Thecover element 53 is adjustable by a sliding actuation in a direction P1into its open position OS, and into its cover position ABS by a slidingactuation in a direction P2 opposite thereto.

The cover element 53 has a partition wall section 56 of the partitionwall 55. The partition wall section 56 is engaged or in contact in thecover position ABS and in the open position OS telescopically or in sucha way with the fixed partition wall section 55A that the partition wall55 is so to speak closed. The partition wall section 56 has a partitionwall receptacle 57 which comprises, for example, mutually opposing sidewalls 56A. The fixed partition wall section 55A can engage in thepartition wall receptacle 57, wherein it engages deeper in the partitionwall receptacle 57 in the open position OS than in the cover positionABS.

Furthermore, recesses 58, 59 are provided on the cover wall 42, throughwhich the toolholders 14, 34 are accessible for a tool change of thetools 15, 35. It is to be mentioned here that the holding elements 14A,34A advantageously have identical actuating contours, for example slotsfor screwdrivers, for a tool, using which the holding elements 14A, 34Acan be released for a tool change and can be fixed on the toolholder 14,34.

A blocking device 85 is provided for a tool change of the scoring tool35. The blocking device 85 comprises a scorer blocking element 85A,which engages in a blocking receptacle 85B, which is connected in arotationally-fixed manner to the scorer toolholder 34, for example isarranged on an output shaft of the gearing 84, in a blocking position.The blocking element 85A is axially displaceable on a guide 85C along apositioning axis S85. By pressing on an actuating contour 85D at a freeend region of the blocking element 85A protruding in front of the guide85C, an operator can engage the blocking element 85A with the blockingreceptacle 85B, thus move it into a blocking position in which thescorer toolholder 34 is blocked in a rotationally-fixed manner. Thisblocking position can be canceled, for example, by pulling on theblocking element 85A in a direction away from the blocking receptacle85B. A spring 85E, which is schematically shown in the drawing, isadvantageously provided, which acts upon the blocking element 85A in arelease position, in which the blocking element 85A does not engage inthe blocking receptacle 85B.

Alternatively or additionally, a motorized drive 85F can also beprovided, for example, an electromagnet, electrical linear drive, etc.,using which the blocking element 85A is adjustable into the blockingposition and/or the release position. For example, the drive 85F can beactive in the blocking position, while the spring 85E acts in therelease position. To switch the drive 85E, for example, an electricalswitch 85G is provided, which is actuatable by the operator by pressureactuation or the like.

A securing device 100 is used for safe and convenient tool change of thesaw tool 15 and/or scoring tool 35.

The securing device 100 disables the switch 60A against switching on ofthe drive motors 12, 32 when it is adjusted into its securing positionSG and releases the switch 60A for switching on the drive motors 12, 32when it is adjusted into a saw operation position FS. Both drive motors12, 32 can thus be disabled simultaneously against switching on by thesecuring device 100 for a tool change.

The securing device 100 comprises an actuating element 101, which ispivotably mounted on the protective housing 29 and/or with respect tothe handle 26 around a pivot axis DB. When the actuating element 101 ispivoted away from the protective housing 29 or handle 26, thus assumesthe position of the securing position SG shown in FIGS. 31 and 32 , thesecuring position SG is immediately recognizable to the operator. Theactuating element 101 comprises a handle part 102 having side legs,between which a part of the protective housing 29 is accommodated in thesaw operation position FS. The actuating element 101 therefore so tospeak clings to the protective housing 29 in the saw operation positionFS, and in any case does not protrude in front of it. Actuating element101 can be grasped manually by an operator on the handle part 102.

A motorized drive 101A for the actuating element 101 is also possible,for example, a schematically shown electric motor, which can drive theactuating element 101 to pivot or rotate and is switchable by means of aschematically shown electrical switch 101B, which is actuatable by anoperator, for example, by a pressure actuation.

The handle part 101 is arranged at the free end region of an actuatingarm 103 of the actuating element 101, which is pivotably mounted with abearing section 104 with respect to the pivot axis DB on the protectivehousing 29.

The actuating element 101 actuates a switch disabling element 105 fordisabling the switch 60A. The disabling element 105 has an arm 106actuatable displaceably and/or pivotably, for example, by the actuatingelement 101, on the free end region of which an engaging-behind contour107, for example a hook, is arranged, which in the disabled position ofthe switch disabling element 105 engages behind the actuating element 60of the switch 60A, so that it can no longer actuate the switch 60A inthe direction of its switching-on position.

It is furthermore advantageous if the actuating element 101 is designedto release the locking device 61. For this purpose, for example, anactuating body 108, for example a cam disc or the like, is movementcoupled with the actuating element 101, for example, in the sense of arotation around the axis DB, which acts on a positioning element 109such that upon adjustment of the actuating element 101 into the securingposition SG, it actuates the actuating element 61A to disengage from thebuttress contour 61B. The saw assembly 11 can thus pivot around thedepth setting axis TS from the upper depth setting position OT into atool changing depth setting position WT suitable for a tool change ofthe saw tool 15.

A detent device 120 is provided for locking in the tool changing depthsetting position WT. The detent device 120 has a detent element 121,which is pivotably mounted around a pivot axis S12. The detent element121 comprises a detent projection 122 to lock with a detent receptacle123, which is arranged fixed in place on the protective housing 29, forexample adjacent to the depth stop guide 63. A spring 124 loads thedetent element 121 in the direction of a detent position, in which itcan lock with the detent receptacle 123.

The detent device 120 is activatable and deactivatable by the securingdevice 100. Specifically, when the actuating element 101 is adjustedinto the securing position SG, it activates the detent device 120. Theactuating element 101 is movement coupled with an actuating body 110 foractivating and deactivating the detent device 120, for example in termsof a rotational movement. The actuating body 110 has an actuating link111 on its side facing toward the detent element 121, which acts on anactuating leg 125 of the detent element 121, specifically in such a waythat with the actuating element 101 adjusted into the securing positionSG, the detent element 121 is released for locking with the detentreceptacle 123 by the spring 124 and/or pre-tensions the spring 124,while with the actuating element 101 adjusted into the saw operationposition FS, the detent element 121 is permanently held disengaged fromthe detent receptacle 123 against the action of the spring 124 and/orthe spring 124 does not have spring tension sufficient for locking thedetent element 121.

When the saw toolholder 14 is adjusted into the tool changing depthsetting position WT, it is arranged in the region of the recesses 58.The scorer toolholder 34 is also adjusted into the tool changing depthsetting position, in which it is arranged in the recess 59, by thedriving device 70. The toolholders 14, 34 are thus accessible for a toolchange of the tools 15, 35.

Furthermore, the actuating element 101 interacts with a blocking device130 or acts on the blocking device 130, using which the saw toolholder14 can be blocked against a pivot around the tool axis of rotation DS.

The blocking device 130 has a saw blocking element 131, which is engagedin a blocking position with at least one blocking contour 132, which isconnected in a rotationally-fixed manner to the saw toolholder 14. Forexample, multiple blocking contours 132 in the form of blocking recesses133 are arranged on a fan wheel 134, which is rotationally coupled tothe saw drive motor 12 and/or the saw toolholder 14. The fan wheel 134has, for example, fan blades 135. The blocking recesses 133 are arrangedon the radial outer circumference of the fan wheel 134.

The motorized drive 101A of the securing device 100 simultaneously formsa drive for adjusting the saw blocking element 131 between its blockingposition blocking the saw toolholder 14 and its release positionreleasing it.

The saw blocking element 131 has a blocking projection 136 at its onelongitudinal end, which can engage in one of the blocking recesses 133when it is opposite thereto due to a corresponding rotational positionof the fan wheel. The other longitudinal end of the saw blocking element131 is movably accommodated, in particular displaceably movable, in abearing, which is not visible in the drawing, and is loaded by a spring137 in the direction of its blocking position. By adjusting theactuating element 101 into the securing position SG, the saw blockingelement 131 is released for actuation by the spring 137 or the spring137 is pre-tensioned by the actuating element 101 to actuate the sawblocking element 131, so that the blocking projection 136 ispre-tensioned to lock with one of the blocking recesses 133. When thesaw toolholder 14 is now pivoted somewhat, one of the blocking recesses133 reaches a frontal position in relation to the blocking projection136, so that it locks in the blocking recess 133 and secures the sawtoolholder 14 against a further pivot.

Switching on of the scorer drive motor 32 is electrically blocked andthus prevented by the securing device 100 adjusted into the securingposition SG. The operator can therefore block the scorer toolholder 34safely by manually actuating the blocking device 85 and change thescoring tool 35.

Alternatively or additionally to this manual actuation, a mechanicaldriving coupling (not shown in the drawing) can also be provided betweenthe scorer blocking element 85A and the saw blocking element 131, sothat when the saw blocking element 131 is adjusted into the blockingposition, the scorer blocking element 85A is also adjusted into theblocking position simultaneously.

When a mechanical connection between the blocking elements 85A and 131is possible with difficulty or not at all, for example, because agearing establishing a coupling of the blocking elements 85A and 131would be complex or has a high space requirement, an electrical couplingis also possible. For example, a sensor 101C is provided for detectingthe position of the securing device 100, for example the positions ofthe actuating element 101. The sensor 101C detects, for example, whetherthe securing device 100 is in the securing position SG or in the sawoperation position FS. In the saw operation position FS, the sensor 101Ccontrols, for example, a

The driving device 70 is schematically shown in FIG. 33 . It can be seenthat the operator can actuate the scoring assembly 31 from the inactiveposition in the direction of the active position by a pivot actuation ofthe saw assembly 11, wherein the force transmission takes place throughthe driving device 70. A scorer drive 32B of the scoring assembly 31 isschematically indicated, wherein, for example, a belt 32C or similarother force transmission element is movement coupled to the saw drivemotor 32 and is driven thereby to drive the scorer toolholder 34. Atensioning roller, which is spring-loaded in particular, and/or a lengthcompensation device or the like (not shown in the drawing), for example,can be provided to tension the belt.

In the exemplary embodiment of the handheld machine saw 10C according toFIG. 34 , a driving device 70C is provided, using which a scoringassembly 31C is carried along upon actuation of the saw assembly 11 fromthe upper depth setting position shown in the drawing in the directionof a lower depth setting position, in which the saw tool 15 protrudes infront of the guide surface 19. However, the scoring assembly 31C isloaded by a spring arrangement 39C in the direction of its activeposition, in which the scoring tool 35 protrudes in front of the guidesurface 19, and not in the direction of its inactive position, as in thehandheld machine saw 10.

A driving surface or stop surface is provided as the actuation generator71C on the saw assembly 11, on which an actuation acceptor 72C of thescoring assembly 31C is supported. The actuation acceptor 72C is, forexample, arranged on an actuating arm, which protrudes from the scoringassembly 31C starting from the scorer depth setting bearing 36. When thesaw assembly 11 is adjusted in the direction of a lower depth settingposition of the saw toolholder 34, the actuation generator 71C so tospeak releases the actuation acceptor 72C, i.e., the spring arrangement39C can adjust the scoring assembly 31C from the inactive position inthe direction of the active position.

In the active position, the scoring assembly 31C advantageously stopswith a stop projection 95C on a scorer depth stop 95D of the guidedevice 17. The depth stop 95D can be adjustable to set different depthsetting positions or active positions, for example, if it is formed bythe head of a screw that can be screwed into the guide device 17. Thestop projection 95C is provided, for example, on a free end region of anarm of the scoring assembly 31C protruding from the depth settingbearing 36.

In the exemplary embodiment of the handheld machine saw 10D, no drivingdevice is provided between its saw assembly 11 and its scoring assembly31D. The scoring assembly 31D is pivotably mounted by means of theexplained depth setting bearing 36 on the guide device 17 around thedepth setting axis TV freely and independently of the saw assembly 11,but has to be manually actuated by an operator. For this purpose, forexample, a scorer handle body 237D is provided, for example, in themanner of an actuating button which protrudes upward with respect to theguide device 17 from the scoring assembly 31D. Furthermore, the stopprojection 95C for stopping on the depth stop 95D is advantageouslyprovided on the scoring assembly 31D.

A switch 60D is arranged on the handle body 237D, for example, to switchon and/or switch off a drive motor 32 of the scoring assembly 31D. Thehandle body 237D thus forms an actuation generator 71D for the scoringassembly 31D.

A rotational drive for adjusting the scoring tool 35 between the activeposition and the inactive position and/or for setting its penetrationdepth into the workpiece is also possible, for example. For example, apositioning motor 72D could be arranged on the scorer depth settingbearing 36 and adjust the scoring tool 35 between various depth settingpositions by rotational drive around the depth setting axis TV.

However, a motorized drive concept is also readily advantageous toadjust a scoring assembly between its inactive position and its activeposition, which is clear on the exemplary embodiment of the handheldmachine saw 10E. Its saw assembly 11 is pivoted manually in thedescribed manner by the operator between the upper depth settingposition and one of the lower depth setting positions by means of thedepth setting bearing 16, while a positioning motor 72E is provided forthe adjustment of the scoring assembly 31E. A sensor is used as theactuation generator 71E of a driving device 70E, which detects therespective rotational positions or relative position of the saw assembly11 with respect to the guide device 17, thus, for example, a respectiveset depth setting position. The sensor or actuation generator 71E isconnected by means of a control connection, for example, a wireless orwired control connection (not shown in the drawing, however), to thepositioning motor 72E, thus an actuation acceptor, of the scoringassembly 31E, to activate it. It is obvious that the positioning motor72E can also be individually activatable, i.e., is decoupled from theactuation generator or sensor 71E. For example, a switching element 99E,which is electrical in particular, can be provided, using which anoperator can individually activate the positioning motor 72E, forexample, to introduce a score into a workpiece without a saw cut beingproduced or to adjust the scoring assembly 31E into the inactiveposition in order to only produce a saw cut using the saw tool 15.Furthermore, a deactivation device 97E is advantageous, for example,also an electrical switch, using which the positioning motor 72E isactuatable in the direction of the inactive position or upper positionof the scorer toolholder 34E and/or using which energizing of thepositioning motor 72E in the direction of the active position of thescorer toolholder 34E can be blocked.

The deactivation device 97E and/or the switching element 99E couldreadily be provided for activating the rotationally driving positioningmotor 72D.

In contrast to the above-described scoring assembly, the scoringassembly 31E is not pivotably mounted with respect to the guide device17, but rather displaceably mounted along a depth setting axis TVS bymeans of a slide bearing 36E. A spring 39E acts on, for example, ascorer carrier 80E, on which a scorer drive motor 32E is held, in thedirection of an inactive position, in which a scoring tool 35E driven bythe scorer drive motor 32E is adjusted back behind the guide surface 19.The positioning motor 72E acts in the opposite direction to the spring39E, thus actuates the scoring tool 35E in the direction of the activeposition, so that the scoring tool 35E protrudes in front of the guidesurface 19 and can engage in the workpiece. However, a depth setting,i.e., a setting of the penetration depth of the scoring tool 35E intothe workpiece W, is also settable by means of the positioning motor 72E.

A scoring assembly 31F of a handheld machine saw 10F is also linearlyadjustable, namely along a depth setting axis TVS by means of a depthsetting bearing, in particular a slide mount 36F. The slide mount 36Fcomprises, for example, guide rods or support columns, on which a scorercarrier 80F is displaceably mounted with respect to the depth settingaxis TVS. The scorer carrier 80F is acted on by a spring arrangement 39Fin its inactive position, in which the scoring tool 35F does notprotrude in front of the guide surface 19.

The scoring tool 35F could comprise a saw blade or scoring blade assuch, but is advantageously also a milling tool or milling head like thescoring tool 35E. The scoring tool 35F is driven by a scorer drive motor32F.

The scoring assembly 31F is also adjustable independently of the sawassembly 11 between its inactive position and one or more activepositions.

In contrast to the handheld machine saw 10E, however, the scoringassembly 31F is not adjustable by motor between the active position andthe inactive position, but rather manually. A spring arrangement 39Floads the scorer carrier 80F in the inactive position. In the directionof the active position, a hand lever or other actuating elementpivotably mounted on the saw assembly 11 is provided as an actuationgenerator 71F, which actuates a force transmission element 90F by manualactuation, for example, a Bowden cable, cable pull, a pneumatic orhydraulic line, or the like, which acts on an actuation acceptor 72F,for example, a fluidic cylinder, a positioning drive, or the like, toadjust the scoring tool 35 in the direction of the active positionagainst the force of the spring arrangement 39F, wherein this movementis advantageously limited by a depth stop 95F, which is arranged fixedin place on the guide device 17.

A scoring assembly 31X essentially corresponds to the scoring assembly31, but has alternative depth setting means 195. While the depth settingmeans 95 effectuate the depth setting by means of the positioning body93, which supports the actuating arm 92, a depth setting element 199 isarranged on the actuation acceptor arm 90, for example, on an actuatingarm projection 92B protruding from the actuating arm 92, and supportsitself on a positioning body 193.

The depth setting element 199 has an actuating element 199A, which isconnected to a screw section 199B or comprises it. The screw section199B is screwed into a screw receptacle 92C on the actuating armprojection 92B. The screw section 199B is arranged on a screw body 199C,which is screwed into the screw receptacle 92C. The screw body 199C isconnected, on the one hand, to the actuating element 199A and, on theother hand, accommodates a support body 199D, which is pin-like orelongated, for example. A free end region of the support body 199Dprovides an actuating surface 192A, using which the actuation acceptorarm 90 is actuatable.

The two-part construction made of support body 199D and screw body 199Chas the advantage that the support body 199D is positionable relative tothe screw body 199C and is then fixable there, for example can beadhesively bonded, to calibrate a first depth setting position ororiginal depth setting position in a fixed manner, which the scoringassembly 31X is to assume. Manufacturing tolerances can thus becompensated for, for example. However, it is readily possible that thedepth setting element 199 is in one piece or parts thereof, for example,the support body 199D and the screw body 199C, consist of one part.

Between the actuating element 199A representing so to speak a head ofthe depth setting element 199 or screw body 199C, on the one hand, andthe actuating arm projection 92B, on the other hand, a spring 199E ispreferably arranged, which is provided, for example, for a lock and/or afriction lock, to fix the depth setting element 199 in the respectiveset depth setting position, for example, to clamp it or hold it byfriction locking. Inadvertent adjustment movements, in particulartriggered by vibrations or the like, can thus be prevented or reduced,for example.

The scorer depth setting means 195 cooperate with a deactivation device197 and with a positioning body 193. The positioning body 193 protrudeslaterally from the scorer carrier 80, similarly to the positioning body93. However, in contrast to the positioning body 93, the positioningbody 193 is pivotably mounted, namely around a pivot axis or positioningaxis SB. The positioning axis SB corresponds to the longitudinal axis orlongitudinal extension of the positioning body 193.

A longitudinal end or bearing end 193A of the positioning body 193,which is designed, for example, like a bearing pin, is pivotably mountedin a bearing receptacle 196, which is arranged fixed in place on thecarrier 80, namely around the positioning axis SB. The bearingreceptacle 196A is designed, for example, like a receptacle sleeve or areceptacle tube. The bearing receptacle 196A is provided, for example,on a bearing body 196, which protrudes from the scorer carrier 80transversely to its longitudinal extension, in particularperpendicularly transversely.

A middle section 193C of the positioning body 193 has a positioningcontour 193D, on which the depth setting element 199 is supported withits actuating surface 192A. The positioning contour 193D is locatedbetween the longitudinal end or bearing end 193A and an actuatingelement 193E, for example a handle, which protrudes transversely to thepositioning axis SB from the positioning body 93 and can be graspedcomfortably by an operator.

The positioning contour 193D has positioning sections 193G and 193H,which are formed by an eccentric circumferential form of the positioningcontour 193D with respect to the pivot axis or positioning axis SB. Thepositioning section 193G is assigned to the activation position AK ofthe deactivation device 197 and protrudes farther in front of thepositioning axis SB than the positioning section 193H, which is assignedto the deactivation position DK. The positioning section 193H thusdeflects the depth setting element 199 a lesser distance from thepositioning axis SB, whereby the actuation acceptor arm 90 is moreremote due to the spring force of the spring arrangement 94 from theactuation generator 71, the guide link 74, than in the activationposition AK. This is because the positioning section 193G, whichprotrudes farther in front of the positioning axis SB, acts in aposition deflecting or actuating the actuation acceptor arm 90 fartherin the direction of the actuation generator 71, in which the actuationacceptor 72 is in contact with the actuation generator 71.

A spring 196E supports itself on one side on a step of the positioningbody 193, on the outer circumference of which the positioning contour193D is provided, and on the other side on a step on the outercircumference of the bearing body 196 and thus loads the positioningbody in terms of a friction lock or a lock in the respective setdeactivation position DK or activation position AK. For example, thespring 196E presses a radial projection or flange projection 193B, onthe outer circumference of which the positioning contour 193D isarranged, against a support surface 196B. The support surface 196B isprovided, for example, on the motor housing 33A.

The scorer drive motor 32 is regularly switched on and switched off bythe switch 60A when the saw drive motor 12 is switched on and switchedoff. In the deactivation position DK of the deactivation device 197,however, the scorer drive motor 32 is not required. It is notproblematic per se when the scorer drive motor 32 is energized, even ifthe scoring assembly 31 or 31X is in its deactivation position DK and/oris in its inactive position IP. The scoring tool 35 is then driven, butdoes not protrude in front of the guide surface 19 in the sense ofengaging in the workpiece W and/or is accommodated in the protectivehousing 29. The scorer drive motor 32 can advantageously be switched offin this situation, however, for example by a switch 32S and/or 32S2. Theswitch 32S or 32S2 is, for example, a component of a control device 32T,which is arranged in the motor housing 33A, or is assigned thereto.

The motor housing 33A has, for example, a receptacle part or lower part33B and a cover 33C which, in the closed state, encapsulates or enclosesthe scorer drive motor 32 and the control device 32T, so that theseelectrical components are protected from environmental influences.

The switch 32S or 32S2 comprises, for example, a magnetic sensor orother sensor operating in a contactless manner or is formed thereby. Theswitch 32S is arranged, for example, on a carrier 32H, for example aprinted circuit board, outside the motor housing 33A and communicateswith the control device 32T. The switch 32S2 provided alternatively oradditionally to the switch 32S is accommodated protected in the interiorof the motor housing 33A and is, for example, a component of the controldevice 32T. An actuating element 32G, for example, a magnetic encoder orthe like, is provided for actuating the switch 32S or 32S2. Theactuating element 32G is actuatable by the positioning body 193. Forexample, the actuating element 32G is accommodated in a holdingreceptacle of the positioning body 193, for example in a pocket. Theactuating element 32G could readily also be arranged on the positioningbody 93. In any case, the actuating element 32G is, for example,displaceable along the positioning axis SA and/or pivotable around thepositioning axis SA or SB, so that its relative position to the sensoror switch 32S or 32S2 changes. The switch 32S communicates with thecontrol device 32T and transmits the respective position of theactuating element 32G thereto. As a function of the respective positionof the actuating element 32G to the switch 32S, it or the control device32T switches the scorer drive motor 32 on or off, namely on in theactivation position AK and off in the deactivation position DK of thepositioning body 93 or 193.

The scoring tool 35 is explained hereinafter in embodiments 35A, 35B,35C, 35D. Insofar as the above-mentioned scoring tools 35-35 D have thesame components, reference is also made very generally to a scoring tool35.

For example, each scoring tool 35 has a blade body 310 having mutuallyopposing flat sides 311, 312. In the scoring tools 35A, 35B, 34C, 35D,scoring tooth arrangements 300A, 300B, 300C, 300D are arranged on aradial outer circumference of the blade body 310. Scoring tootharrangements 300A, 300B, 300C, 300D have different numbers of scoringteeth 301-304. For example, the scoring tooth arrangement 300A hasscoring teeth 301, 302, 303, 304, thus a total of four scoring teeth,while the scoring tooth arrangement 300B only has three scoring teeth301, 302, 303 and the scoring tooth arrangement 300C has only onescoring tooth 301 and finally the scoring tooth arrangement 300D hasonly two scoring teeth 301, 302.

The blade body 310 has a machine receptacle 315 at its center ZV fordetachable fastening on the scorer toolholder 34 of the machine saw 10.The center ZV is penetrated by a center axis or axis of rotation DV ofthe scoring tool 35, which is the axis of rotation of the scorertoolholder 34 at the same time, when the scoring tool 35 is fastened onthe machine saw 10.

The scoring teeth 301-304 protrude with main cutting edges 350 from aradial outer circumference 313 of the blade body 310 or scoring tool 35,so that they are ready there to cut into the workpiece surface WO of theworkpiece W.

The scoring teeth 301-304 thus protrude from a radial outercircumferential surface 314 of the blade body 310. The circumferentialsurface 314 essentially has the form of a cylindrical jacket.

Comparatively large angle intervals are present between the scoringteeth 301-304. For example, in the scoring tool 35, angle intervals WAof approximately 90° or exactly 90° are provided between the scoringteeth 301-304. In the scoring tool 35B, angle intervals WB of, forexample, 120° are provided between the scoring teeth 301-303. In thescoring tool 35C, only a single scoring tooth 301 is present, whichresults in an angle interval of 360°. If two scoring teeth 301, 302 areprovided in the case of the scoring tooth arrangement 300D, they arepreferably equidistant to one another and have an angle interval WD of180°.

It is to be mentioned at this point that of course different angleintervals can also be provided between scoring teeth. For illustration,for example, in the scoring tool 35A, the scoring tooth 303 is shown bydashed lines. It could not be present, for example.

A chip space 316 is provided in front of each scoring tooth 301-304. Thechip space 316 is formed by a depression 317 of the blade body 310,which is designed radially inward from the radial outer circumference313 like a trough, in particular an approximately U-shaped or V-shapedtrough. Each depression 317 or each chip space 316 has a bottom 318,from which lateral surfaces 319, 320 extend away in the direction of theradial outer circumference 313. The lateral surfaces 319, 320 areessentially linear. The lateral surface 319 faces toward a respectivemain cutting edge 350 of a scoring tooth 301-304, while the lateralsurface 320 of the chip space 316 is so to speak opposite to this maincutting edge 350. An arc-shaped transition part 321 extends between thelateral surface 320 and the radial outer circumference 313 or thecircumferential surface 314.

Except for the chip spaces 316, the radial outer circumference 313extends in the form of a circle or circular ring around the center axisof the blade body 310 or scoring tool 35, thus the axis of rotation DV.Thus, for example, this arc-shaped profile extends over an angle of atleast 30°, preferably at least 40° or even more with respect to the axisof rotation DV, even if four scoring teeth 301-304 are provided in thecase of the scoring tool 35A.

These scoring teeth 301-304 each have a cutting body 330. Each cuttingbody 330 is fastened using a fastening part 331 on the blade body 310,in particular on the lateral surface or close to the lateral surface319. For example, the lateral surface 319 has a step into which therespective cutting body 332 is inserted. For example, the fastening part331 is accommodated in such a step. The fastening part 331 of thecutting body 332 is supported at the rear on the blade body 310.

Sections 332 of the cutting body 330 protrude radially outward withrespect to the axis of rotation DV from the blade body 310. Lateralsections 333 of the cutting body 330 protrude from the flat sides 311,312. The sections 332, 333 are therefore mechanically loaded in workingoperation of the scoring tool 35, thus when it cuts into the workpieceW, but are optimally supported by the fastening part 331. Furthermore,it is advantageous if the cutting bodies 330 have support projections334 protruding radially inward, which are also supported on the bladebody 310.

The cutting teeth 301-304, therefore the cutting bodies 332, have themain cutting edges 350, which extend, for example, in parallel to theaxis of rotation DV or center axis of the scoring tool 35.

Secondary cutting edges 351 extend transversely to the main cutting edge350. The secondary cutting edges 351 are, for example, somewhat morethan perpendicular, thus, for example, in an angle range of 90-110°,with respect to the main cutting edge 350, which is located between thesecondary cutting edges 351. For example, the main cutting edge 350 andthe respective adjacent cutting edge 351 enclose an angle 354 which isat least 90° and at most 110°. In the exemplary embodiment, an angledimension WI of the angle 354 is, for example, approximately 7°.

The secondary cutting edges 351 extend radially inward with respect tothe axis of rotation DV, wherein radially inner end regions 355 have aradial distance RD to the main cutting edge 350. The secondary cuttingedges 351, which extend slightly or flatly obliquely inclined withrespect to the flat sides 311, 312, enable the production of the scoreRI in different depths, wherein the transverse width of the respectivescore RI increases when the scoring tool 35 plunges or penetrates deeperinto the workpiece surface WO. The maximum depth Rmax of the score RI isthus fundamentally determined by the radial distance RD.

However, the score RI could be produced even deeper in the present case,specifically, for example, if side parts 352 of the cutting bodies 332or scoring teeth 301-304 are also designed as cutting edges. The sideparts 352 extend, for example, in parallel to a center plane of theblade body 310 or perpendicular to the axis of rotation DV.

A score RI produced by the scoring tool 35 has a score bottom RB, fromwhich side flanks RF extend up to the workpiece surface WO. A transversewidth of the bottom RB is determined by the transverse distance Q1 ofthe secondary cutting edges 351 in the region of the main cutting edge350 or the length of the main cutting edge 350.

A step 353 is formed between the radially inner ends of the side parts352 and the respective flat side 311, 312.

The saw tool 15 comprises, for example, a saw blade 15A. A blade body370 of the saw blade 15A has mutually opposing flat sides 371, 372 and asaw tooth arrangement 376 having saw teeth 377 on its radial outercircumference 373 with respect to the axis of rotation DS, around whichthe saw blade 15A rotates during saw operation.

The number of the saw teeth 377 is greater than the number of thescoring teeth 301-304. Furthermore, the saw teeth 377 have a smallerangle interval with respect to the axis of rotation DS, around which thesaw blade 15A is driven, than the scoring teeth 301-304 with respect tothe axis of rotation DV.

The saw tool 15 is provided and designed for sawing or cutting into theworkpiece W from its lower side WU. At its center ZS, the saw blade 15Ahas a machine receptacle 375, which is penetrated by the axis ofrotation DS or center axis of the saw blade 15A.

The radial outer circumference 373 has an external diameter D73, whichis, for example, three to four times greater than an external diameterD13 of the outer circumference 313 of the scoring tool 35.

An internal diameter D75 of the machine receptacle 375 of the saw blade15A is greater than an internal diameter D15 of the machine receptacle315 of the scoring tool 35.

A maximum transverse width of the score RI in the region of theworkpiece surface is settable in that the scoring tool 35 penetrates todifferent depths into the workpiece surface WO. A maximum width of thescore RI, thus a maximum distance of the score side flanks RF, isdetermined by a transverse distance Q2, which the secondary cuttingedges 351 have in relation to one another in the region of the maximumradial distance RD. The score RI can thus be at most as wide as thetransverse distance Q2.

Such an adaptation is advantageous in particular because the scoringtool 35 can thus be used in conjunction with different saw tools or sawblades, but in any case with saw tools, the cutting width or cut widthof which (in relation to the respective length parallel to the axis ofrotation DS), can be different. The above-mentioned adaptation is alsoadvantageous in conjunction with manufacturing tolerances or dimensionaltolerances of the saw tool or saw blade and/or in the case of differentplunging depths of the saw blade into the workpiece or the like.

The scoring tool 35A can be adjusted with respect to its penetrationdepth into the workpiece W. The scorer toolholder 34 is a component ofthe scoring assembly 31, which has a scorer drive 23A. The scorer drive32A comprises a scorer drive motor 32, which drives the scorertoolholder 34 directly or via a gearing (not shown in the schematicillustration), on which the scoring tool 35 is in turn arranged. Forexample, a mounting flange penetrates the machine receptacle 315. Forexample, a stepped gearing can be provided between the drive motor 32and the tool holder 34, so that the axis of rotation of the toolholder34 and the motor axis of rotation of the drive motor 32 do not align, inparticular the motor axis of rotation of the drive motor 32 has agreater distance to a region of the scoring tool 35 which is provided topenetrate into the workpiece W than the drive axis of rotation DV.

The saw toolholder 14, on which the machine receptacle 375 is arranged,is drivable by a saw drive motor 12, for example directly or via agearing (not shown in the drawing).

The scoring assembly 31 is also arranged, like a saw assembly 11, on aguide device 17, for example movably on a guide body 18 of the guidedevice 17. Its guide surface 19 is provided for guiding along theworkpiece surface WO. Both the saw toolholder 14 and also the scorertoolholder 34 are adjustable in depth with respect to the guide surface19, so that they protrude different distances in front of it.Penetration depths of the scoring tool 35 and the saw tool 15 into theworkpiece W are thus settable.

The saw tool 15 is now set or settable so that is its main cutting edges380 cut into the workpiece W from the workpiece lower side WU. Inaddition, secondary cutting edges 381 extend adjacent to the maincutting edges 380 at an angle thereto, which so to speak produce theside flanks of the saw cut SAE, which can be cut using the saw tool 15into the workpiece W. In any case the saw cut SAE has a saw cut widthSBB, which is effectuated by the length of the main cutting edges 380,on the one hand, also by the secondary cutting edges 381, on the otherhand, which are inclined, for example, obliquely to the main cuttingedge 380 similarly as the secondary cutting edges 351 to the maincutting edges 350.

Since the saw teeth 377 cut into the workpiece W from the workpiecelower side WU and thus move out of it on the workpiece upper side WO,this has the risk that the side flanks of the saw cut SAE will tear outin the region of the workpiece upper side WO. The scoring tool 35 is nowto be set or is set with respect to its penetration depth into theworkpiece W or the amount by which the scoring tool 35 protrudes infront of the guide surface 19 so that score RI has a score width RBB atthe workpiece surface WO which is greater than saw cut width SBB. Thesaw tool 15 or saw blade 15A then emerges from the workpiece W betweenthe side flanks RF of the score RI at the workpiece surface WO. Thus,for example, if a cover or a coating, a veneer, or the like is arrangedon the workpiece surface WO, the cover or the coating is not tangent toor damaged by the saw teeth 377 emerging from the workpiece W.

The oblique inclination of the side flanks RF has the advantage that thescore RI has a slight chamfer or bevel in the transition region to theworkpiece surface WO.

The saw drive motor 12 has an external diameter D12, the scorer drivemotor 32 has an external diameter D32. In relation to the externaldiameter of the respective driven scoring tool 35 or saw tool 15, theexternal diameter D12 of the saw drive motor 12 is less than theexternal diameter D32 of the scorer drive motor 32. Therefore, forexample, the ratio of the external circumference D73 to the externalcircumference D12 or the quotient of external circumference D73 toexternal circumference D12 is greater than the ratio of the externalcircumference D13 to the external circumference D32 or the quotient ofexternal circumference D13 to external circumference D32 of the scorerdrive motor 32.

Speeds of the saw toolholder 14 and the scorer toolholder 34 can besettable, for example, by means of setting means 12B and/or 32B. It ispossible that the scorer toolholder 34 is always operated at the samespeed, while the speed of the saw toolholder 14, for example, the speedof the saw drive motor 12, is settable. The configuration is made hereso that the scorer toolholder 34 is driven or drivable at at least twicethe speed, preferably three times or four times the speed of the sawtoolholder 14.

Furthermore, rotational directions VS, VR of the toolholders 14, 34 areopposite. The toolholder 34 for the scoring tool 35 is driven, forexample, with the rotational direction VR, which corresponds to areverse cut saw. The rotational direction VR thus has the effect thatthe scoring tool 35 so to speak conveys or drives the machine saw 10along the workpiece W.

The rotational direction VS of the saw toolholder 14 is chosen so thatforce is applied to the guide surface 19 in the direction of theworkpiece surface WO.

In the cutting body 330, the secondary cutting edges and main cuttingedges are linear. Alternatively, however, main cutting edges andsecondary cutting edges having curved, for example convex or concaveprofiles, also in combination, or also secondary cutting edges and/ormain cutting edges having sections of different inclination and/orcurvature are possible.

For example, a cutting body 330B has a main cutting edge 350 having alinear profile, while secondary cutting edges 351B, between which themain cutting edge 350 is arranged, have edge sections 360B, 361B. Theedge sections 360B are, for example, linear profiles. The edge sections360B are, for example, perpendicular to the main cutting edge 350. Incontrast, the sections 361B are flatly obliquely inclined with respectto the sections 360B and have an angle of for example, 103-105° withrespect to the main cutting edge 350.

A cutting body 330C also has the main cutting edge 350, but secondarycutting edges 351C having sections 360C and 361C. The sections 360C areconcave with respect to a center plane MI, which extends between theflat sides 311 and 312 of the blade body 310, but with lesser curvaturethan the sections 361C.

To illustrate a convex profile, a cutting body 330D is shown, thesecondary cutting edges 351D of which are concave with respect to thecenter plane MI.

Alternatively to the linear main cutting edge 350, for example, the maincutting edge 350D can be provided, which has a convex profile in adirection away from the blade body 310.

Furthermore, it is advantageous if the cutting bodies or scoring teethof a scoring tool are so to speak symmetrical, i.e., form a cutting edgeon mutually opposing sides and thus in the region of each flat side 311,312. However, it is also possible that scoring teeth or cutting bodieshave a cutting edge only on one flat side 311 or 312. This isschematically indicated in the cutting body 330B. For example, insteadof a right secondary cutting edge 351B in the drawing, a lateral surface359 can be provided on a cutting body 330B, which does not protrude fromthe flat side 311, and on a following or leading cutting body 330B inthe circumferential direction of the blade body 310 or scoring tool 35,a lateral surface 359 not protruding from the flat side 312 can beprovided instead of a left secondary cutting edge 351B in the drawing.

1. A mobile handheld machine saw having a saw assembly, which has a sawtoolholder for a saw tool and a saw drive motor for driving the sawtoolholder and, having a guide device, which has a guide body having aguide surface extending along a longitudinal axis for guiding thehandheld machine saw along a working direction on a workpiece or a guiderail, wherein a saw cut can be introduced along the working directioninto the workpiece by means of the saw tool protruding in front of theguide surface in sawing operation of the handheld machine tool, whereinthe handheld machine saw has a scoring assembly, which is arranged infront of the saw assembly in a longitudinal position with respect to thelongitudinal axis on the guide device with respect to the workingdirection, having a scorer toolholder for a scoring tool, and having ascorer drive for driving the scorer toolholder, which movably mounted onor with respect to the guide device by means of a scorer depth settingbearing along a depth setting movement path between at least one activeposition, in which the scoring tool arranged on the scorer toolholderprotrudes in front of the guide surface to introduce a score upstreamfrom the saw cut to be introduced in the working direction into theworkpiece, and an inactive position, in which the scoring tool isadjusted behind the guide surface and wherein the handheld machine sawfurther comprises a scorer handle body assigned to the scoring assemblyhaving a handle surface for an operator for guiding the handheld machinetool, which is arranged on an upper side of the guide device opposite tothe guide surface in the longitudinal position of the scorer toolholderor the scoring assembly.
 2. The handheld machine saw as claimed in claim1, wherein the scorer handle body and/or the scoring assembly forms thefrontmost component of the handheld machine saw in the working directionor the frontmost component that can be grasped by an operator or thefrontmost component that protrudes from the upper side of the guidedevice and can be grasped by an operator, which is arranged on the guidebody.
 3. The handheld machine saw as claimed in claim 1 wherein the sawtoolholder is movably mounted on or with respect to the guide device bymeans of a saw depth setting bearing between an upper depth settingposition and at least one lower depth setting position, wherein the sawtool protrudes farther in front of the guide surface in the lower depthsetting position than in the upper depth setting position.
 4. Thehandheld machine saw as claimed in claim 3, wherein a solid depthsetting bearing is separate from the scorer depth setting bearing and/oris arranged at a longitudinal distance with respect to the workingdirection on the guide body.
 5. The handheld machine saw as claimed inclaim 3 further comprising at least one saw assembly handle, using whichthe saw toolholder, is actuatable between the upper depth settingposition and the at least one lower depth setting position, wherein thescorer handle body assigned to the scoring assembly comprises the atleast one saw assembly handle is formed by the at least one saw assemblyhandle, wherein the scorer toolholder is actuatable by means of the sawassembly handle between the inactive position and the at least oneactive position and the saw assembly handle is actuatable with respectto the guide body beyond a position assigned to the active position ofthe scorer toolholder to adjust the saw toolholder into the at least onelower depth setting position.
 6. The handheld machine saw as claimed inclaim 3, wherein, to provide a driving coupling between the sawtoolholder and the scorer toolholder, the handheld machine saw has adriving device, by which, upon a movement of the saw toolholder betweendepth setting positions, the scorer toolholder is carried along betweenthe inactive position and the at least one active position, wherein thedriving device has an actuation generator arranged on the saw assemblyfor actuating an actuation acceptor arranged on the scoring assembly. 7.The handheld machine saw as claimed claim 1, wherein the scorer handlebody is arranged fixed in place on the guide device with respect to thedepth setting movement path of the scorer toolholder, so that its handlesurface is fixed in place with respect to the depth setting movementpath and can be loaded with an actuating force in the force direction ofthe movement path.
 8. The handheld machine saw as claimed in claim 1,wherein the scorer handle body is arranged pivot-fixed on the guidedevice with respect to pivot axes extending transversely to thelongitudinal axis of the guide device.
 9. The handheld machine saw asclaimed in claim 1, wherein the scorer drive is arranged between theupper side of the guide device and the handle surface of the scorerhandle body.
 10. The handheld machine saw as claimed in claim 1, whereinthe scorer handle body is arranged on a scoring assembly housing of thescoring assembly or is formed by the scoring assembly housing, whereinthe scoring assembly housing has a receptacle space, in which at leastone movable component of the scoring assembly, is accommodated movablyrelative to the scorer handle body.
 11. The handheld machine saw asclaimed in claim 10, wherein the at least one movable componentcomprises the scorer drive and/or scorer depth setting means for settinga distance of the scorer toolholder (34) to the guide device or theguide surface and/or the penetration depth of the scoring tool into theworkpiece in the at least one active position.
 12. The handheld machinesaw as claimed in claim 10 wherein the handle surface is formed by awall, of the scoring assembly or is arranged on the wall.
 13. Thehandheld machine saw as claimed in claim 10, wherein the handle surfaceof the scorer handle body is arranged on a part of the scoring assemblyhousing facing away from the upper side of the guide body.
 14. Thehandheld machine saw as claimed in claim 1, wherein an intermediatespace or distance is provided between a saw assembly housing and thescorer handle body and/or the scoring assembly housing, in relation tothe longitudinal axis of the guide device or the guide body, in which atleast one actuating element of the scoring assembly provided foractuation by an operator, is arranged.
 15. The handheld machine saw asclaimed in claim 1, wherein the scorer handle body comprises a handlebody separate from a scoring assembly housing of the scoring assembly oris formed thereby.
 16. The handheld machine saw as claimed in claim 15,wherein an intermediate space is provided between the scorer handle bodyseparate from the scoring assembly housing of the scoring assembly andthe scoring assembly, so that an operator can reach into theintermediate space to grasp the scorer handle body.
 17. The handheldmachine saw as claimed in claim 1, wherein the scorer handle body ispivotably mounted on the guide device to change the relative position ofthe scorer handle body to the guide surface by means of a pivot bearingarrangement, around a pivot axis, parallel to the working direction orto the longitudinal axis of the guide device.
 18. The handheld machinesaw as claimed in claim 1, wherein the scorer handle body is arrangedfixed in place on a carrier for accommodating the saw tool and/or thescoring tool, for the scoring assembly and/or the scorer toolholder,wherein the carrier is pivotable relative to the guide device to changethe relative position of the scorer toolholder to the guide surface,around at least one pivot axis, parallel to the working direction or tothe longitudinal axis of the guide device.
 19. The handheld machine sawas claimed in claim 18, wherein the saw toolholder is arranged on thecarrier.
 20. The handheld machine saw as claimed in claim 18, whereinthe guide body has a handle part on its upper side, which is at leastessentially concealed by the scoring assembly in a pivot position of thecarrier pivoted toward the upper side and is exposed for actuation by anoperator of the handheld machine saw in a pivot position of the carrierpivoted away from the upper side.
 21. The handheld machine saw asclaimed in claim 1, wherein the scorer handle body protrudes freely infront of the carrier with a free end region.
 22. The handheld machinesaw as claimed in claim 21, wherein the handle surface extends up to thefree end region or is arranged on the free end region and/or a supportpart is arranged on the free end region at a distance to the carrier,which is supported on the upper side of the guide device in at least onepivot position with respect to the at least one pivot axis.
 23. Thehandheld machine saw as claimed in claim 1, wherein the scorer handlebody has a longitudinal shape and extends along a handle longitudinalaxis, which extends transversely, to the longitudinal axis of the guidedevice.
 24. The handheld machine saw as claimed in claim 1, wherein theguide body has long sides extending in parallel to its longitudinalaxis, between which the scoring assembly is arranged, wherein the scorertoolholder is arranged on the one long side and the scorer handle bodyextends away from this long side up to the other long side.
 25. Thehandheld machine saw as claimed in claim 1, wherein the handle surfaceof the scorer handle body and/or a handle part of the guide body,comprises a handle groove and/or a planar surface and/or a handle knobwhich can be grasped with a hand.
 26. The handheld machine saw asclaimed in claim 1, wherein at least one saw assembly handle is arrangedon the saw assembly behind the scorer handle body in relation to theworking direction.
 27. The handheld machine saw as claimed in claim 26,further comprising a saw assembly handle arranged behind the sawtoolholder on the saw assembly in relation to the working direction. 28.The handheld machine saw as claimed in claim 27, wherein the sawassembly handle arranged behind the saw toolholder on the saw assemblyin the working direction has a longitudinal shape having a longitudinalaxis, which extends in parallel to the longitudinal axis of the guidebody.
 29. The handheld machine saw as claimed in claim 26, furthercomprising a saw assembly handle arranged in front of the saw toolholderon the saw assembly in relation to the longitudinal axis of the guidebody parallel to the working direction in at least one depth settingposition of the saw toolholder.
 30. The handheld machine saw as claimedin claim 29, wherein the saw assembly handle has a longitudinal shapehaving a longitudinal axis, which extends transversely, to thelongitudinal axis of the guide body.
 31. The handheld machine saw asclaimed in claim 29, wherein the saw assembly handle and the scorerhandle body are pivotable on the guide device by means of a miterbearing arrangement around a miter axis parallel to the workingdirection or to the longitudinal axis of the guide device.
 32. Thehandheld machine saw as claimed in claim 1, wherein the scorer handlebody does not form a component of a bearing body and/or a setting deviceor an adjustment device of the handheld machine saw and/or does not forma component of scorer depth setting means for setting a distance of thescorer toolholder to the guide device or the guide surface and/or thepenetration depth of the scoring tool into the workpiece in the at leastone active position.
 33. The handheld machine saw as claimed in claim 1,wherein the scorer handle body, except for a protective function orcover function for a component of the handheld machine saw, isexclusively used as a handle to be grasped by an operator.